I have to say while I agree with your definition of sin, I wholeheartedly disagree with this statement of yours.
First of all, your interpretation of Luke 13:24 hinges on a works based salvation. It suggests if one exerts to please God, he will earn his salvation. It suggests that if one does not work hard enough, salvation may be lost on this person. It suggests many things but salvation through faith alone by grace alone is not one of them.
Second, I also disagree with your handling of Matthew 24:13. It also suggests a system of salvation through works. You even went so far to as claim that one is not yet saved but will be if he sticks it out and endures as if it will be of his own strength which will result in a merit of sorts.
Salvation is either all God or none of God but it is not partially God and partially man in some synergistic cosmic partnership.
I agree that endurance plays a major role in salvation but you are putting the cart before the horse so to speak. You are saying endurance produces salvation. I am saying salvation produces endurance. Let's look at some of the verses that seemingly support your stance. We'll then look at some that seemingly support mine. Lastly, we will put them all in the proper context.
It seems so cut and dry. By these verses, it appears that salvation is the byproduct of perseverance and endurance. However, how do we reconcile that with these verses which seemingly place the ball in God's court?
So what is it? Is it our endurance that produces salvation or salvation that produces endurance? It obviously can't be both. In fact, only one is even remotely biblical.
Any time it speaks of salvation in the future tense, it is not referring to our faith but rather, our physical salvation from this earthly world. As John MacArthur puts it, "It is not that a person's endurance will produce salvation but that his endurance will be a Spirit-empowered product and proof of the reality that he is saved....The person who endures in faith whatever hardship or persecution may come to him because of his relationship to Christ demonstrates that he belongs to Christ, and Christ assures that person that he shall be saved.He will eventually be delivered out of the present evil system of lawlessness and ungodliness into God's eternal kingdom of righteousness."
Obedience to God requires, not just believing, but action. Jesus, in teaching his disciples, said: "Why, then,
do you call me ‘Lord! Lord!’ but
do not do the things I say ? Everyone that comes to me and
hears my words and does them, I will show you whom he is like: He is like a man building a house, who dug and went down deep and laid a foundation
upon the rock-mass. Consequently, when a flood arose, the river dashed against that house, but was not strong enough to shake it, because of its being well built. On the other hand, he who
hears and does not do, is like a man who built a house upon the ground
without a foundation. Against it the river dashed, and
immediately it collapsed, and the ruin of that house became great.”(Luke 6:46-49)
Obviously some feel as you do, that faith alone is all that is necessary. However, James wrote: "Nevertheless, a certain one will say: “You have faith, and I have works. Show me your faith apart from the works, and
I shall show you my faith by my works.” You believe there is one God, do you? You are doing quite well. And yet the demons believe and shudder. But do you care to know,
O empty man, that
faith apart from works is inactive ? Was not
Abraham our father
declared righteous by works after he had offered up Isaac his son upon the altar ? You behold that his faith worked along with his works and
by his works his faith was perfected. and the scripture was fulfilled which says: “Abraham put faith in Jehovah, and it was counted to him as righteousness,” and he came to be called “Jehovah’s friend.” You see that
a man is to be declared righteous by works, and
not by faith alone. In the same manner was not also Ra´hab the harlot declared righteous by works, after she had received the messengers hospitably and sent them out by another way ? Indeed, as the body without spirit is dead, so also
faith without works is dead."(James 2:18-26)
The apostle Paul wrote to the Philippians: "Consequently, my beloved ones, in the way that you have always obeyed, not during my presence only, but now much more readily during my absence,
keep working out your own salvation with fear and trembling."(Phil 2:12)
The churches have taught that all you have to do is "be a good Christian", ' believing on the Lord Jesus and you will be saved '. However, this line of reasoning is faulty and displays a hollow faith. It lacks that which should accompany genuine faith in Jehovah God and his "only-begotten Son", Jesus Christ, that of authentic "works".
Jesus gave several commands that show the "works" a true Christian is to have, in order for his foundation to be built "upon the rock-mass". Of a few, Jesus said:
(1) "I am giving you a new commandment, that you love one another; just as I have loved you, that you also love one another. By this all will know that you are my disciples, if you have love among yourselves.”(John 13:34, 35) Have the churches followed this commandment, or instead have they gone to war against even members of their own religious organization in different nations ? In WWI and WWII, Catholic fought against Catholic, Protestant against Protestant, Methodist against Methodist. These ' did not do the things I say " as Jesus said at Luke 6:46, but rather followed the will of their respective nations in going to war. These did not "love your neighbor as yourself ".(Matt 22:39)
Of the churches support of political leaders in World War I, British Brigadier General Frank P. Crozier said: “The Christian Churches are the finest blood-lust creators which we have and of them we made free use.” (
A Brass Hat in No Man’s Land, published in 1930) Referring to the role of nominal Christian churches during World War I, historian Paul Johnson wrote: “Clergymen were unable, and for the most part unwilling, to place Christian faith before nationality. Most took the easy way out and equated Christianity with patriotism. Christian soldiers of all denominations were exhorted to kill each other in the name of their Saviour.”
(2) "If you were part of the world, the world would be fond of what is its own. Now because you are no part of the world, but I have chosen you out of the world, on this account the world hates you."(John 15:19) How many of the churches have adhered to this commandment, abstaining from any participation in the political arena, even mentally ? Rather, have not many, though professing to be "Christian", meddled in the political affairs of the nations, with some even running for the various political offices ?
(3) "Go therefore and make disciples of people of all the nations, baptizing them in the name of the Father and of the Son and of the holy spirit, teaching them to observe all the things I have commanded you."(Matt 28:19, 20) How many of the churches are going "from house to house"(Acts 20:20; Matt 10:11-15), teaching people to observe "all the things" that Jesus commanded, conducting Bible studies with interested individuals ?
So, yes, to please God requires that we '
exert ourselves vigorously to get in through the narrow door '. Otherwise, "many, I tell you, will seek to get in but will not be able."(Luke 13:24) In addition, Jesus said that those who have genuine faith accompanied by legitimate works, have need of endurance, saying: "he that has
endured to the end is the one that
will be saved", followed by the statement and command: "And this good news of the kingdom will be preached in all the inhabited earth for a witness to all the nations; and then the end will come."(Matt 24:13, 14)
Hence, only those who sternly adhere to Jesus words with genuine "works" down "to the end...will be saved." Jesus identified that only "a few" would measure up to the requirements for life, saying that "narrow is the gate and cramped the road leading off into
life, and
few are the ones finding it."(Matt 7:14)