If you do a yoga that does not change the patterns of energy within you, I would say, don't waste your time on it.
Meditation means to go beyond the limitations of body and mind.
When you are truly meditative, there is no time and space for you. Time and space is just a creation of the mind.
Higher dimensions of Awareness means Higher dimensions of energy.
A guru is not a crutch, he is a bridge.
Death is not a disaster. Too many births - that is the real disaster.