A moral virtue which restrains the inordinate appetite for high things.
Its foundation is the knowledge of ourselves and of our relations to God.
The former recognizes our natural weakness, checking presumption; and our defects and sins, forbidding self-exaltation over others.
The latter acknowledges our subjection to God's law and His providence, inclining to submission to creatures for God's sake.
Thus humility is necessary for salvation.
"Unless you become as little children you shall not enter the Kingdom of Heaven" (Matthew 18).
New Catholic Dictionary