Philo Judaeus Quod Deterius Potiori Insidiari Soleat 29

[29] but there are some adversaries who, by reason of their vigorous body, their antagonists having succumbed, have gained the prize of victory without a struggle, not having even had, to descend into the arena to contend for it, but obtaining the chief honours on account of their incomparable strength. Using such a power as this with reference to the most divine thing that is in us, namely, our mind, "Isaac goes forth into the plain;" ¹ not for the purpose of contending with any body, since all those who might have been his antagonists, are terrified at the greatness and exceeding excellence of his nature in all things; but only wishing to meet in private, and to converse in private with the fellow traveller and guide of his path and of his soul, namely God.