There is a childhood of the soul

Only what thou art in thyself determines thy value, not what thou hast.

Being alone when one’s belief is firm, is not to be alone.

Books make men alone for themselves.

Perfect solitude is when, for a whole day, no human eye has beheld your face.

He who possesses a firm faith, although in solitude, is not alone.

It lies in our own power to attune the mind to cheerfulness.