Whether the Old Law was suitably given at the time of Moses?

Objections

Objection 1 : It would seem that the Old Law was not suitably given at the time of Moses. Because the Old Law disposed man for the salvation which was to come through Christ, as stated above (Articles [2],3). But man needed this salutary remedy immediately after he had sinned. Therefore the Law should have been given immediately after sin.
Objection 2 : Further, the Old Law was given for the sanctification of those from whom Christ was to be born. Now the promise concerning the "seed, which is Christ" (Gal. 3:16) was first made to Abraham, as related in Gn. 12:7. Therefore the Law should have been given at once at the time of Abraham.
Objection 3 : Further, as Christ was born of those alone who descended from Noe through Abraham, to whom the promise was made; so was He born of no other of the descendants of Abraham but David, to whom the promise was renewed, according to 2 Kgs. 23:1: "The man to whom it was appointed concerning the Christ of the God of Jacob . . . said." Therefore the Old Law should have been given after David, just as it was given after Abraham.