Really, the fundamental, ultimate mystery -- the only thing you need to know to understand the deepest metaphysical secrets -- is this: that for every outside there is an inside and for every inside there is an outside, and although they are different, they go together.
For the secret of man's being is not only to live but to have something to live for. Without a stable conception of the object of life, man would not consent to go on living, and would rather destroy himself than remain on earth, though he had bread in abundance.
This campaign of non-cooperation has no reference to diplomacy, secret or open. The only diplomacy it admits of is the statement and pursuance of truth at any cost.
I am more afraid of deserving criticism than of receiving it. I stand in awe of my own opinion. The secret demerits of which we alone, perhaps, are conscious, are often more difficult to bear than those which have been publicly censured in us, and thus in some degree atoned for.
The cabinets of the sick and the closets of the dead have been ransacked to publish private letters and divulge to all mankind the most secret sentiments of friendship.