This is placing an artificial qualification on God's grace and implying some symbolic ritual is necessary for salvation, salvation which was given freely at Jesus' sacrifice, so, in short, you're saying "Jesus' sacrifice wasn't good enough, we must do more". God told us, "it is not what we do", provided we do not deny Him.
It's like you want to say "this conscious decision I've made, because I'm awake and can, is not an act", but it is to God. It is. But it is possible, in these acts we do to consciously, because you're awake, and can, deny God. That is how one loses salvation. That is what you're being tricked into doing when you say, "Jesus' sacrifice wasn't good enough, I must do more".