Happiness is only real when shared.
The happiness of the creature consists in rejoicing in God, by which also God is magnified and exalted
Love is when the other person's happiness is more important than your own
There is only one happiness in this life, to love and be loved.
Success in its highest and noblest form calls for peace of mind and enjoyment and happiness which come only to… (read more)
Love is the condition in which the happiness of another person is essential to your own.
For every SF reader of that period, Robert A. Heinlein was also a touchstone.