Humble people don’t think less of themselves. They just think of themselves less. (Norman Vincent Peale, American proponent of Positive Thinking)
Genuine humility is not self-effacing or being a Mr. Milquetoast, a sort of proverbial floor mat to be walked on. Like meekness, which really is restrained power, humility allows a person to see himself as he or she really is. But, he/she thinks of others more, and is concerned more for their well-being than for his or her own.
Do not think of yourself more highly than you ought. (Romans 12:3) In humility value others above yourselves, not looking to your own interests but . . . to the interests of the others. (Philippians 2:3-4)