To accept is easy; to continue is difficult

A passage from the Lotus Sutra reads that it is "the most difficult to believe and the most difficult to understand." Many hear about and accept this sutra, but when great obstacles arise, just as they were told would happen, few remember it and bear it firmly in mind. To accept is easy; to continue is difficult. But Buddhahood lies in continuing faith.

The Writings of Nichiren Daishonin
The Difficulty of Sustaining Faith
Written to Shijo Kingo on March 6, 1275