Lord 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 YoganandaTo work with God's happiness bubbling in the soul is to carry a portable paradise within you wherever you go.
Paramahansa YoganandaThe soul is bound to the body by a chain of desires, temptations, troubles and worries, and it is trying to free itself. If you keep tugging at that chain which is holding you to mortal consciousness, some day an invisible Divine Hand will intervene and snap it apart and you will be free.
Paramahansa YoganandaIn vegetables and fruits, God has infused medicinal power to help in overcoming disease. Even these, however, have but a limited potency. The organs of the body are essentially sustained by the energy of God, and the person who employs various methods to increase this energy will have at his command a greater power for healing than is afforded by any medicine or diet.
Paramahansa Yogananda