II.B. True Mind Is Not Disclosed because of Delusion

In the Ten-Mind-Worlds Sutra:

Within the body of an indigent-being is a diamond Buddha-nature;

Like the luminous radiance, of bright sunshine and as vast and limitless;

But, 'its just not visible because of the black cloud of five skandhas;

Like a candle(which cannot be seen) inside a bottle.

Also, in the Nirvana Sutra:

All indigent-beings have the Buddha-Nature;

But have not attained Nirvana, because the unenlightened darkness has concealed it.

II.C. Good Dharma Is the Root of Enlightening