One of the first conditions of happiness is that the link between Man and Nature shall not be broken.

There can be no peace for us, only misery, and the greatest happiness.

Effort is not a means to lead us to happiness. Effort itself is happiness.

Happiness is pleasure without regret.

Happiness does not depend on outward things, but on the way we see them.

Love alone is the only reasonable activity or pursuit of humankind....For Love not only annihilates our fear of meaninglessness but empowers us to seek the happiness of others. And this indeed is our greatest happiness.