Pain and joy are like light and darkness; they are two sides of the same medal. They are interdependent and inseparably connected to each other.
That which gives pleasure to one man gives pain to another. That sage who identifies himself with the imperishable Self and stands as a spectator of the mental modifications enjoys supreme peace and infinite bliss.
Alone let him constantly meditate in solitude on that which is salutary for his soul, for he who meditates in solitude attains Supreme Bliss.
He it is, the innermost one, who awakens my being with his deep hidden touches. He it is who puts his enchantment upon these eyes and joyfully plays on the chords of my heart in varied cadence of pleasure and pain.
Learn to make the whole world your own. No one is a stranger, my child; this whole world is your own.

