Whether any preparation and disposition for grace is required on man's part?

Objections

Objection 1 : It would seem that no preparation or disposition for grace is required on man's part, since, as the Apostle says (Rm. 4:4), "To him that worketh, the reward is not reckoned according to grace, but according to debt." Now a man's preparation by free-will can only be through some operation. Hence it would do away with the notion of grace.
Objection 2 : Further, whoever is going on sinning, is not preparing himself to have grace. But to some who are going on sinning grace is given, as is clear in the case of Paul, who received grace whilst he was "breathing our threatenings and slaughter against the disciples of the Lord" (Act 9:1). Hence no preparation for grace is required on man's part.
Objection 3 : Further, an agent of infinite power needs no disposition in matter, since it does not even require matter, as appears in creation, to which grace is compared, which is called "a new creature" (Gal. 6:15). But only God, Who has infinite power, causes grace, as stated above (Article [1]). Hence no preparation is required on man's part to obtain grace.