Meditation and Sefirot re. You can do whatever you want to do.
Nothing is forbidden.
But at the same time you must realize that what you do has no effect in spiritual realms. Having learned that you can now choose if you still want to do it. The best way to learn about yourself is through contact with other people. That's why we were created as social beings, so that we may take advantage of our daily encounters with other people and through them learn of our selfishness and egoism. Sitting in a candle lit room chanting away your blues may be good for lifting your spirit, but it won't teach you a thing about spirituality.