Syrah
Reading over Thirteen's description of the Hanged Man, the following stood out at me: "On the ninth day, with no conscious thought of why, he climbs a branch and dangles upside down like a child, giving up for a moment, all that he is, wants, knows or cares about." From this, I see his actions as being subconsciously driven and somewhat spontaneous.
Perhaps in addition to what everyone else has said here, the card is also telling you that enhancing your spiritual "discipline" is not something that can entirely be planned or trained for ("discipline" brings to mind repetitive, conscious exercises intended to strengthen some aspect of ourselves). Rather, live in the moment as many here have suggested, and anticipate that some of your "discipline lessons" will happen spontaneously and not in ways that you ever expected (i.e. outside the box).
Perhaps in addition to what everyone else has said here, the card is also telling you that enhancing your spiritual "discipline" is not something that can entirely be planned or trained for ("discipline" brings to mind repetitive, conscious exercises intended to strengthen some aspect of ourselves). Rather, live in the moment as many here have suggested, and anticipate that some of your "discipline lessons" will happen spontaneously and not in ways that you ever expected (i.e. outside the box).