Whether sacraments are necessary for man's salvation?

Objections

Objection 1 : It seems that sacraments are not necessary for man's salvation. For the Apostle says (1 Tim. 4:8): "Bodily exercise is profitable to little." But the use of sacraments pertains to bodily exercise; because sacraments are perfected in the signification of sensible things and words, as stated above (Question [60], Article [6]). Therefore sacraments are not necessary for the salvation of man.
Objection 2 : Further, the Apostle was told (2 Cor. 12:9): "My grace is sufficient for thee." But it would not suffice if sacraments were necessary for salvation. Therefore sacraments are not necessary for man's salvation.
Objection 3 : Further, given a sufficient cause, nothing more seems to be required for the effect. But Christ's Passion is the sufficient cause of our salvation; for the Apostle says (Rm. 5:10): "If, when we were enemies, we were reconciled to God by the death of His Son: much more, being reconciled, shall we be saved by His life." Therefore sacraments are not necessary for man's salvation.