Examine thus yourself from every side.
Note harmful thoughts and every futile striving.
Thus it is that heroes in the bodhisattva path
Apply the remedies to keep a steady mind.

Shantideva (685-763), Shantideva was an 8th-century CE Indian Buddhist monk and scholar at Nalanda. He was an adherent of the Madhyamaka philosophy of Nagarjuna. Apparently he was one of those people who didn't show up for anything, never studying or coming to practice sessions. His fellow monks said that his three "realizations" were eating, sleeping, and shitting.