When with our mouths we chant the Mystic Law, our Buddha nature, being summoned, will invariably emerge.

Buddhism Day by Day

Wisdom for Modern Life by Daisaku Ikeda
Thursday, March 7, 2013:

 

When we revere Myoho-renge-kyo inherent in our own life as the object of devotion, the Buddha nature within us is summoned forth and manifested by our chanting of Nam-myoho-renge-kyo. This is what is meant by "Buddha." To illustrate, when a caged bird sings, birds who are flying in the sky are thereby summoned and gather around, and when the birds flying in the sky gather around, the bird in the cage strives to get out. When with our mouths we chant the Mystic Law, our Buddha nature, being summoned, will invariably emerge.