64. We cannot, then, doubt that the knowledge of God depends on the occasion and not on any change on His part: by the occasion being meant the occasion, not of obtaining but of declaring knowledge, as we learn from His words to Abraham, Lay not thine hand upon the lad, neither do thou anything unto him, for now I know that thou fearest thy God, and hast not withheld thy beloved son, for My sake562 Gen. xxii. 12.. God knows now, but that now I know is a profession of previous ignorance: yet it is not true, that until now God did not know the faith of Abraham, for it is written, Abraham believed in God, and it was counted to him for righteousness563 Ib. xv. 6., and therefore this now I know marks the time when Abraham received this testimony, not when God began to know. Abraham had proved, by the sacrifice of his son, the love he bore to God, and God knew it at the time He spoke: but as we cannot suppose that He did not know before, we must for this reason suppose that He took knowledge of it then because He spoke.
By way of example, we have chosen for our consideration this passage out of many in the Old Testament, which treat of the knowledge of God, in order to shew that when God does not know, the cause lies, not in His ignorance, but in the occasion.
64. Deus dicitur id modo scire, quod modo profert. ---Non ergo ambigi licet, Dei scientiam ex tempore potius esse quam ex demutatione, cum ad id quod 0332B Deus scit, profitendae 308 potius scientiae tempus sit, quam adeptae: ut etiam ex hoc docemur, quod ad Abraham dictum est: Ne injicias manum tuam in puerum, et ne facias illi quidquam: nunc enim cognovi quia times Deum tuum, et non pepercisti filio tuo dilecto propter me (Gen. XXII, 12). Deus itaque modo scit: modo autem scire, anterioris ignorantiae professio est. Quod cum in Deum non cadat, neque ut ignoraverit antea fidelem sibi esse Abraham, de quo dictum est, Credidit Abraham Deo, et deputatum est ei ad justitiam (Gen. XV, 6; et Rom. IV, 3): hoc quod nunc cognovit, tempus est quo Abraham testimonium accepit, non etiam (quo) scire Deus coepit. Abraham enim, holocausto filii, dilectionem quam ad Deum habebat docuerat: Deus 0332C tum cognovit, cum loquitur. Et quia ante nescire non intelligendus est; necesse est idcirco tunc intelligatur cognosse, quia loquitur. Et de plurimis quidem, quae de scientia Dei Testamento Veteri continentur, haec tantum exempli causa demonstrata a 0333A nobis sunt: ut id, quod nescit Deus, non ignorationis causa intelligeretur esse, sed temporis.