Mastering Buddhism … remains impossible without enough time to absorb it. And if you are to devote enough time to studying Buddhism, it will be nearly impossible to obey one’s parents, masters, and the sovereign as well. Those who aim at attaining Buddhahood cannot afford to be obedient to parents, masters, and sovereign until they reach the ultimate way to cut the chain of birth and death.

Hōon-jō, Essay on Gratitude, Writings of Nichiren Shōnin, Doctrine 3, Pages 2.