Rely on the Law and not upon persons, other than the Buddha

"In a scripture called the Nirvana Sutra, the Buddha says, “Rely on the Law and not upon persons.” Relying on the Law here means relying on the various sutras. Not relying upon persons means not relying on persons other than the Buddha, such as the bodhisattvas Universal Worthy and Manjushrī or the various Buddhist teachers I have enumerated earlier." - On Repaying Debts of Gratitude, one of Nichiren's Five Major Writings