Am i confused, thelogically mistaken or both?

Reading through on the Lord's offering in Burroughs, discussing it with friends, and also just hearing it preached from the pulpit. I think i am at some points completely in agreement, and others i find myself standing alone. I love how Burroughs talks through the section on examine ourselves, how he can only go as far to keep himself clean. But im getting bogged down in theology of how grace, as it pertains to edification, is related to communion or even how that same grace correlates with the Christian life, or even biblical examples of it. I understand that all i do that is good before God is the power of God being used through me, and inso it is "not i, but Christ". So i suppose the question that would help me in understanding would be, where in the scripture can we find progressive edification and where does it relate to communion?