St John of the Cross: "take up your cross"

Then Jesus said to his disciples, "If anyone would come after me, he must deny himself and take up his cross and follow me.

According to St. John of the Cross, the person wishing to advance toward perfection should "take care into whose hands he entrusts himself, for as the master is, so will the disciple be, and as the father is so will be the son." And further: "In addition to being learned and discreet a director should be experienced. . . . If the spiritual director has no experience of the spiritual life, he will be incapable of leading into it the souls whom God is calling to it, and he will not even understand them.

-- CCC 2690