Sadness and gladness succeed each other

I too have known joy and sadness, and, on the whole, I prefer joy

If you see a friend without a smile; give him one of yours.

Sadness usually results from one of the following causes either when a man does not succeed, or is ashamed of his success

She was becoming sad. There is no joy involved in following others' expectations of yourself.

People who shout joy from the rooftops are often the saddest of all.