Life without death and happiness without misery are contradiction and neither can be found alone, because each of them is a different manifestation of the same thing.
When a thoughtful human being has overcome incentives to vice and is aware of having done his bitter duty, he finds himself in a state that could be called happiness, a state of contentment and peace of mind in which virtue is its own reward.
Happiness is a myth we seek,
If manifested surely irks;
Like river speeding to the plain,
On its arrival slows and murks.
For man is happy only in
His aspiration to the heights;
When he attains his goal, he cools
And longs for other distant flights.