At our church a Presbyterian in good standing in his chruch could and would be invited to partake of the Lord's supper but not join the assembly untill he was baptized by immersion. I guess that's as close to Bunyan as we would get. However, I, like Bunyan fear that this doctrine becomes and idol for some.

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1689 Baptist Confession

Psa 55:16 As for me, I will call upon God; and the LORD shall save me.
Psa 55:17 Evening, and morning, and at noon, will I pray, and cry aloud: and he shall hear my voice.
James Farley, Wilderness Road Baptist Assembly.
Husband of Melissa and father of Ann.
www.wildernessroadbaptist.org