It is the appointment of Christ, not ours; and at his table we are his guests, not he ours.

The Saviour is well represented as saying to us, "Thou canst not entertain a king! Unworthy thou of such a guest; But I my own provision bring, To make thy soul a heavenly feast." There is a divine side to sacraments, as there is a divine side in conversion.

While we are active in regeneration, there is a work of God wrought in us, distinct from our faith and repentance, yet inseparable from it.

So, while sacraments are vows on our part to God, they are, primarily, gifts, pledges, seals, on his part to us.

Therefore, when one says, "I can bring up my children, I can be a Christian, without the use of sacraments," it is a proper reply, "But can God do his part toward your children, and toward you, without them ?" For, not only is prayer "the offering up of our desires to God for things agreeable to his will," but there is the additional truth, which is well expressed in those lines of a hymn: "Prayer is appointed to convey The blessings God designs to give." So with sacraments; they convey gifts from God, not primarily gifts from us to God.
He, then, who declines to have his children baptized, on the ground that it is useless, may, in so doing, interrupt the communication of a divinely-appointed medium between God and his child.