Clement of Rome on Humility in 95CE

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 you use, 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, “On whom shall I look, but on him that is meek and peaceable, and that trembles at My words?”

It is right and holy therefore, men and brethren, rather to obey God than to follow those who, through pride and sedition, have become the leaders of a detestable emulation. For we shall incur no slight injury, but rather great danger, if we rashly yield ourselves to the inclinations of men who aim at exciting strife and tumults, so as to draw us away from what is good. Let us be kind one to another after the pattern of the tender mercy and benignity of our Creator.

For it is written, “The kind-hearted shall inhabit the land, and the guiltless shall be left upon it, but transgressors shall be destroyed from off the face of it.” … Let us cleave, therefore, to those who cultivate peace with godliness, and not to those who hypocritically profess to desire it. For [the Scripture] says in a certain place, “This people honors Me with their lips, but their heart is far from Me.”