"Sacred is that which we hold sacred."
No, sacred is that which God holds sacred. Ask Uzza. (1 Chron. 13:9, 10)
Generally, I think this comment is from man's point of view, because it is man who recognizes God's presence through the Ark or the Eucharist. I do not intend on arguing that God does not hold the Ark as sacred, but it is for man's sake - the Sabbath is sacred and ALSO made for man.