From Self-Development and the Way to Power, by L. W. Rogers (1)

It is the natural right of every human being to be happy--to escape
all the miseries of life. Happiness is the normal condition, as
natural as the landscapes and the seasons. It is unnatural to suffer
and it is only because of our ignorance that we do suffer. Happiness
is the product of wisdom. To attain perfect wisdom, to comprehend
fully the purpose of life, to realize completely the relationship of
human beings to each other, is to put an end to all suffering, to
escape every ill and evil that afflicts us. Perfect wisdom is
unshadowed joy.