The desire for happiness is innate in every man; therefore it is legitimate.

When trying to satisfy it selfishly--that is, by seeking for oneself riches, fame, comforts, or love--it may happen that circumstances arise which make it impossible to satisfy these desires.
It follows that it is these desires that are illegitimate, but not the need for happiness.

But what desires can always be satisfied despite external circumstances?
What are they?
Love, self-sacrifice.' He was so glad and excited when he had discovered this, as it seemed to him, new truth, that he jumped up and began impatiently seeking some one to sacrifice himself for, to do good to and to love.

'Since one wants nothing for oneself,' he kept thinking, 'why not live for others ?' He took up his gun with the intention of returning home quickly to think this out and to find an opportunity of doing good.

He made his way out of the thicket.