Ecclesiastes 7:21-25

²¹Also take no heed to all words that are spoken; lest thou hear thy servant curse thee:

²²For often also thy own heart knoweth that thou thyself likewise hast cursed others.

²³All this have I proved by wisdom: I said, I will be wise; but it was far from me.

²⁴That which is far off, and exceedingly deep, who can find it out?

²⁵I applied my heart to know, and to search, and to seek out wisdom, and the reason of things , and to know the wickedness of folly, even of foolishness and madness: