What is material and what is not? When the world is the end and God is the means to attain that end, that is material. When God is the end and the world is only the means to attain that end, spirituality has begun.
Swami Vivekananda...never try to follow another's path for that is his way, not yours. When that path is found, you have nothing to do but fold your arms and the tide will carry you to freedom.
Swami VivekanandaNot even the deepest sleep will give you such a rest as meditation can. The mind goes on jumping even in deepest sleep. Just those few moments in meditation your brain has almost stopped. ... You forget the body. ... You feel such pleasure in it. You become so light. This perfect rest we will get in meditation.
Swami Vivekananda