Rituals and Heresies

Let’s imagine this Sabbath I decide to put a basin of water just inside the entryway to the room in which we worship. You see me come in, dip my hand in it, and bless myself by making the sign of the cross. And then as I go to sit down, I kneel beside my seat and bless myself again. For sake of discussion: Is there anything necessarily wrong with doing those things? The action is relatively harmless in-and-of-itself. But, what kind of message would that convey? Does it line up with who we are in Messiah and what we are trying to convey at our Sabbath meetings?