Loneliness
Solitude is the profoundest fact of the human condition. Man is the only being who knows he is alone. Octavio Paz
Man's loneliness is but his fear of life Eugene O'Neill
Loneliness is and always has been the central and inevitable experience of every man Thomas Wolfe
One may acquire everything in solitude but character Stendahl
Pray that your loneliness may spur you into finding something to live for, great enough to die for Dag Hammarskjold