Whether Christ opened the gate of heaven to us by His Passion?

Objections

Objection 1 : It would seem that Christ did not open the gate of heaven to us by His Passion. For it is written (Prov. 11:18): "To him that soweth justice, there is a faithful reward." But the reward of justice is the entering into the kingdom of heaven. It seems, therefore, that the holy Fathers who wrought works of justice, obtained by faith the entering into the heavenly kingdom even without Christ's Passion. Consequently Christ's Passion is not the cause of the opening of the gate of the kingdom of heaven.
Objection 2 : Further, Elias was caught up to heaven previous to Christ's Passion (4 Kgs. 2). But the effect never precedes the cause. Therefore it seems that the opening of heaven's gate is not the result of Christ's Passion.
Objection 3 : Further, as it is written (Mt. 3:16), when Christ was baptized the heavens were opened to Him. But His baptism preceded the Passion. Consequently the opening of heaven is not the result of Christ's Passion.
Objection 4 : Further, it is written (Mic. 2:13): "For He shall go up that shall open the way before them." But to open the way to heaven seems to be nothing else than to throw open its gate. Therefore it seems that the gate of heaven was opened to us, not by Christ's Passion, but by His Ascension.