Nichiren Daishonin states in “Letter to Niike”:
When people first begin to believe in this sutra, they appear to be sincere in their faith. However, midway through their practice, many weaken in their faith and no longer serve or respect the priest or present offerings. They arrogantly form their own distorted views. We must fear this. It is most frightening. From beginning to end, be persistent in cultivating faith throughout your life. If not, you will have regrets. For instance, it takes twelve days to travel from Kamakura to Kyoto. If you journey for approximately eleven days and stop a day away from your destination, how can you possibly admire the moon over the capital?