Matthew 13:31-32
Jesus told them another parable, saying, "The kingdom of heaven is similar to a seed from the mustard tree which a man took and planted in his field.
Matthew 13:12
For to the person who [already] has something, [more] will be given, so he will have a larger amount [i.e., of understanding], but from the person who has [almost] nothing, even [the little] he has will be taken away from him.
2 Peter 2:20
For if people who have escaped from the defiling practices of the world by coming to know our Lord and Savior Jesus Christ, become tangled up in them again, and are overcome by them, these people are worse off than before they were converted.