Baptism and the Lord's Supper become spiritually helpful, not from any virtue in them, or in him who does administer them1 , but only by the blessing of Christ2 , and the working of the Spirit in those who by faith receive them.3
7 So then neither is he that planteth any thing, neither he that watereth; but God that giveth the increase.
1 Peter 3:21
21 The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ:
1 Corinthians 3:6
6 I have planted, Apollos watered; but God gave the increase.
1 Corinthians 12:13
13 For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit.