The source of all humor is not laughter, but sorrow.

Pure and complete sorrow is as impossible as pure and complete joy.

Only people who are capable of loving strongly can also suffer great sorrow, but this same necessity of loving serves to counteract their grief and heals them.

Wherever good fortune enters, envy lays siege to the place and attacks it; and when it departs, sorrow and repentance remain behind.

Parting is such sweet sorrow that I shall say goodnight till it be morrow.

Train your eyes and ears; train your nose and tongue. The senses are good friends when they are trained. Train your body in deeds, train your tongue in words, train your mind in thoughts. This training will take you beyond sorrow.