HKB
know that anything is, that thing necessarily is, so when I know that anything will be, it will necessarily be. It follows, then, that things foreknown come to pass inevitably.
'Lastly, to think of a thing as being in any way other than what it is, is not only not knowledge, but it is false opinion widely different from the truth of knowledge. Consequently, if anything is about to be, and yet its occurrence is not certain and necessary, how can anyone foreknow that it will occur? For just as knowledge itself is free from all admixture of falsity, so any conception drawn from knowledge cannot be other than as it is conceived. For this, indeed, is the cause why knowledge is free from falsehood, because of necessity each thing must correspond exactly with the knowledge which grasps its nature. In what way, then, are we to suppose that God foreknows these uncertainties as about to come to pass? For if He thinks of events which possibly may not happen at all as inevitably destined to come to pass, He is deceived; and this it is not only impious to believe, but even so much as to express in words. If, on the other hand, He sees them in the future as they are in such a sense as to know that they may equally come to pass or not, what sort of foreknowledge is this which comprehends nothing certain nor fixed? What better is this than the absurd vaticination of Teiresias?
'"Whate'er I say Shall either come to pass--or not."