Today, in Bible time, one passage we talked about was Matthew 23:12. " And whosoever shall exalt himself shall be abased; and he that shall humble himself shall be exalted." This verse explains that those who lift THEMSELVES up will be abased. But, on the other hand, those who humble themselves will be lifted up by God. Another verse in relation to this passage is James 4:10. "Humble yourselves in the sight of the Lord, and he shall lift you up."
A good example of this is found in I Kings, chapter 1. In this chapter, David is growing old and is almost ready to die. One of his sons, Adonijah, lifts HIMSELF up, (in verse 5), by making himself king. But, King David had promised his wife, Bathsheba, that Solomon would reign. So, Bathsheba went and told the King what his son had done. King David then made Solomon king and Adonijah was eventually killed. This is just one of many examples that proves this passage true. As Proverbs 27:2 says, "Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips." I hope this helps you in your Christian walk.