Da'as Tevunos - Section 28

Said the Intellect - let us define this general rule, and afterward proceed to another very fundamental introduction. This is the rule, HaShem may his name be blessed, held back, as if it were possible, Himself, meaning, that he withheld his ability, with the creation of his creations to not make them according to his power, rather according to that which he wished and intended in them; and he created them deficient so that they would complete themselves, and their completion would be their reward in the merit of that which the exerted effort in order to achieve. And this was only from His desire to make complete goodness: