Re the Remembrance Supper, this is a function that pursues the evidence of full confidence of the cabdidate in the Omnipotent Christ to Save, which cannot be undone. Participation in it is an ordinance for His local body of saints, to show His death ‘till He returns (fully alive); as is the water immersion (once), the ritual of induction into the Company of the Committed for a life of discipleship that follows the public confession of allegiance of the recruited servant to the Head Captain of the local assenbly.
Both are desired for the spiritually reborn member of The Bride, but are not required to establish or retain the gracious bestowal of ever-lasting absolute life. Philippians 1:6 “ Being confident of this very thing that He which hath begun a good work in you will perform it until the Day of Jesus Christ:” (cf 2Tim. 1:12).
Both are good works, a part of the ligh burden of progressive sanctification through discipleship, and not a part of the conditions for salvation, ofwhich both the seeker and the Savior must interact in faith and faithfulness alone.
Also whether the qualifier 'I' means that a person cannot decide on their own to later to go away from Him.
(Now there will be those who say, "Well, that person never REALLY came to Jesus.")
NOW you've done it! LOL
'Tis a good thing we are snowed in today.