What is the right way of seeking that source? The way to seek it is first to learn the psychology of one's own life: what makes one fall, what makes one rise, what makes one fail, what makes one succeed, what gives one happiness, what brings one sorrow. Then one should study the nature of pleasure and pain, whether it is a lasting pain or whether it is a lasting pleasure, a momentary pleasure, or a momentary pain; and then find out the deceitful and false nature of one's own impressions, how under cover of pain there was pleasure, and how under cover of pleasure there was pain; how in the worst person there is some good to be found, and how in the best there is something bad to be traced. This widens the point of view of a man and prepares the ground of his heart to realize the secret of enjoyment.