Minucius Felix speaks of the cross of Jesus in its familiar form, likening it to objects with a crossbeam or to a man with arms outstretched in prayer (Octavius of Minucius Felix, chapter XXIX).
"At every forward step and movement, at every going in and out, when we put on our clothes and shoes, when we bathe, when we sit at table, when we light the lamps, on couch, on seat, in all the ordinary actions of daily life, we trace upon the forehead the sign" (De Corona, chapter 3)