Nirvana: Sudden and Gradual (poem)

Nirvana is of the sudden and the gradual.
The gradual is by one's self power
while the sudden is by the Buddha's other power.
Self power begins with one breath despite hardship,
while other power continues onwards with ease.
With single-mindedness in meditation
the sudden happens easily
aided with recitation of
Namu Amida Butsu.