For he knoweth not that which shall be. The subject may be man in general, or more probably the evil tyrant. The clause contains a third reason for patience. The despot cannot foresee the future, and goes on blindly filling up the measure of his iniquity, being unable to take any precautions against his inevitable fate (Proverbs 24:22).
Quem Deus vult perdere prius dementat. For who can tell him when it shall be? rather, how it shall be. The fourth portion of the argument. The infatuated man knows not the time when the blow will fall, nor, as here, the manner in which the retribution will come, the form which it will take.
Septuagint," For how it shall be, who will tell him?" The Vulgate paraphrases inaccurately, Quia ignorat prae-terita, et futura nullo scire potest nuntio, "Because he knoweth not the past, and the future he can ascertain by no messenger."