Ecclesiastes 7:9

Be not hasty in thy spirit to be angry From sins of speech in general, the teacher passes on to that which is the source from which they most often flow. Anger, alike from the Stoic and Epicurean stand-point (and the writer, as we have seen, had points of contact with each of them), was the note of unwisdom. If it be right at all, it is when it is calm and deliberate, an indignation against moral evil. The hasty anger of wounded self-love is, as in the teaching of the Sermon on the Mount (Matthew 5:22), destructive of the tranquillity of true wisdom, and, transient and impulsive as it seems at first, may harden "in the bosom of the fool" into a settled antipathy or malignant scorn.