In his book on the Lord’s Supper, Puritan Thomas Watson warns of neglecting the sacrament:
Has Jesus Christ been at all this cost to make a feast? Then, surely, there must be guests. (Luke 22:19). It is not left to our choice whether we will come or not; it is a duty purely indispensable. “Let him eat of that bread” (1 Corinthians 11:28), which words are not only permissive, but authoritative. It is as if a king should say, “Let it be enacted.”
The neglect of the Sacrament runs men into a gospel penalty. It was infinite goodness in Christ to broach that blessed vessel of His body and let His sacred blood stream out. It is evil for us wilfully to omit such an ordinance wherein the trophy of mercy is so richly displayed and our salvation so nearly concerned. Well may Christ take this as an undervaluing of Him, and interpret it as no better than a bidding Him to keep His feast to Himself. He who did not observe the passover was to be cut off. (Numbers 9:13). How angry was Christ with those who stayed away from the supper! They thought to put it off with a compliment. But Christ knew how to construe their excuse for a refusal. “None of those men which were bidden shall taste of My supper,” (Luke 14:24). Rejecting gospel mercy is a sin of so deep a dye that God can do no less than punish it for a contempt. Some need a flaming sword to keep them from the Lord’s Table, and others need Christ’s whip of small cords to drive them to it.