Psalms 75:5

"Be not therefore lifted up: speak not iniquity against God" [Psalm 75:5]....What says He in another Psalm? "These things you have done," having enumerated certain sins. "These things you have done," He says, "and was silent." What is, "I was silent"? He is never silent with commandment, but meanwhile He is silent with punishment: He is keeping still from vengeance, He does not pronounce sentence against the condemned. But this man says thus, I have done such and such things, and God has not taken vengeance; behold I am whole, nought of ill has befallen me. "These things you have done, and I was silent: you have suspected iniquity, that I shall be like you." What is, "that I shall be like you"? Because you are unjust, even Me you have deemed unjust; as though an approver of your misdeeds, and no adversary, no avenger thereof. And what afterwards says He to you? "I will convict you, and will set you before your own face"? What is this? Because now by sinning behind your back you set yourself, see not yourself, examinest not yourself; I will set you before yourself, and will bring upon you punishment from yourself. So also here, "Speak not iniquity against God." Attend. Many men speak this iniquity; but dare not openly, lest as blasphemers they be abhorred by godly men: in their heart they gnaw upon these things, within they feed upon such impious food; it delights them to speak against God, and if they break not out with tongue, in heart they are not silent. Whence in another Psalm is said, "The fool has said in his heart, There is no God." The fool has said, but he has feared men: he would not say it where men might hear; and he said it in that place where He might Himself hear concerning whom he said it.