lash oneself to the mast

verb2

1. •
   To continue in a course of action even when facing great difficulties and likely disaster.

   • I hoped not—all authorities seemed to agree the only thing a man could do in such weather was lash himself to the mast and pray. I made a last stubborn attempt to pour logic on the troubled waters. — 2010
2. •
   To resist the temptation to make a bad choice.

   • The only way in which she could contain her despairing and murderous rage was to lash herself to the mast of her towering superego. — 2002