It gives me happiness to testify to the beneficial effects of this
method, because I am earnestly convinced that no other discovery in
physical science has ever been made which is of such importance to the
welfare of the human race. In proportion as I have followed this method
life has become wholesome and happy. It avoids the opposite evils of
asceticism and self-indulgence, and does more than _any other single
thing_ to make the marriage relation a perpetual courtship. I am a
husband of fifteen years, and speak of matters that I know.