What does the Bible mean by conversion?

Conversion is a vital aspect of the Christian experience, marked by a total transformation in one’s attitudes, motivations, and desires. In Matthew 18:3, Jesus states, 'Except you be converted and become as little children, you shall not enter into the kingdom of heaven.' This signifies that to enter God’s kingdom, one must adopt a posture of humility and dependency, akin to that of a child. Conversion follows the new birth, wherein the believer, having received spiritual life, is enabled to see their need for Christ and submits to Him fully. It encompasses a turning from self-righteousness and a deep acknowledgment of one's need for divine grace, embodying the evidence of true regeneration in the life of a believer.