Let us therefore, brethren, be of humble mind, laying aside all haughtiness, and pride, and foolishness, and angry feelings; and let us act according to that which is written (for the Holy Spirit says, “Let not the wise man glory in his wisdom, neither let the mighty man glory in his might, neither let the rich man glory in his riches; but let him that glories glory in the Lord, in diligently seeking Him, and doing judgment and righteousness”), being especially mindful of the words of the Lord Jesus which He spoke teaching us meekness and long-suffering.
For thus He spoke: “Be merciful, that you may obtain mercy; forgive, that it may be forgiven to you; as you do, so shall it be done unto you; as you judge, so shall you be judged; as you are kind, so shall kindness be shown to you; with what measure ye mete, with the same it shall be measured to you.” By this precept and by these rules let us establish ourselves, that we walk with all humility in obedience to His holy words. For the holy word says, O” n whom shall I look, but on him that is meek and peaceable, and that trembles at my words. ” (Isaiah 66:2)
[St. Clement of Alexandria, Letter for the Corinthians]