Purity is one thing (and biblical too; hooray). But soul mate in the sense of "the one correct person for you to marry" isn't biblical.
One you are married
that person is your soul mate. But before you got married they were not your future husband/wife set aside and only you can marry them to be in God's will.
If you honestly disagree with me (aside from showing me where in the bible supports your view please
) can you tell me what then happens when one person marries
not their "correct soul mate". Then 4 people (the two who married each other incorrectly, plus the two they were each "supposed" to marry) are out of God's will? And then what if the two that the married two were supposed to marry then each married another "incorrect soul mate"? Then you have 8 people out of God's will for their spouse and only 3 marriages!
Hopefully people can see why this is not how God's word indicates he operates
God intends for us to commit and covenant with our spouse for earthly life, but I can't find biblical support for people viewing singles as "another person's spouse".
It makes me think of:
New International Version (NIV)
Matthew 11:28-30
28 “Come to me, all you who are weary and burdened, and I will give you rest. 29 Take my yoke upon you and learn from me, for I am gentle and humble in heart, and you will find rest for your souls. 30 For my yoke is easy and my burden is light.”
Luke 11:46
Jesus replied, “And you experts in the law, woe to you, because you load people down with burdens they can hardly carry, and you yourselves will not lift one finger to help them.
Acts 15:28-29
28 It seemed good to the Holy Spirit and to us
not to burden you with anything beyond the following requirements: 29 You are to abstain from food sacrificed to idols, from blood, from the meat of strangled animals
and from sexual immorality. You will do well to avoid these things.
Farewell.
(It's useful to keep in mind that in other places in the New Testament it says eating meat that has been sacrificed to idols is not actually bad at all, except that it might cause others seeing a Christian doing so to stumble...)
All the best in your consideration of this topic.