Those who look at the surface of the sea must behold the birth and death of the waves, but those who seek the depths of the ocean behold one indivisible mass of water. Similarly, those who acknowledge "life" and "death" are tossed by sorrow, while those who live in the illimitable superconsciousness behold and feel the One Ineffable Bliss.
Paramahansa YoganandaLord Krishna... proclaims Self-realization, true wisdom, as the highest branch of all human knowledge-the king of all sciences, the very essence of dharma ("religion")-for it alone permanently uproots the cause of man's threefold suffering and reveals to him his true nature of Bliss. Self-realization is yoga or "oneness" with truth-the direct perception or experience of truth by the all-knowing intuitive faculty of the soul.
Paramahansa Yogananda