Reply to Objection 2: The efficacy of Christ's Resurrection reaches souls not from any special virtue of His risen body, but from the virtue of the Godhead personally united with it.
Reply to Objection 3: The resurrection of souls pertains to merit, which is the effect of justification; but the resurrection of bodies is ordained for punishment or reward, which are the effects of Him who judges. Now it belongs to Christ, not to justify all men, but to judge them: and therefore He raises up all as to their bodies, but not as to their souls.
Reply to Objection 4: Two things concur in the justification of souls, namely, forgiveness of sin and newness of life through grace. Consequently, as to efficacy, which comes of the Divine power, the Passion as well as the Resurrection of Christ is the cause of justification as to both the above. But as to exemplarity, properly speaking Christ's Passion and death are the cause of the forgiveness of guilt, by which forgiveness we die unto sin: whereas Christ's Resurrection is the cause of newness of life, which comes through grace or justice: consequently, the Apostle says ( Rom. 4:25 ) that "He was delivered up," i.e. to death, "for our sins," i.e. to take them away, "and rose again for our justification." But Christ's Passion was also a meritorious cause, as stated above (A[1], ad 4; Q[48], A[1]).