When body, breath, and mind work together in harmony to achieve a spiritual goal, that is yoga.
The world is not a burden; we make it a burden by our desires. When the desires are removed, the world is as light as a feather on an elephant's back.
Who realizes what? That is realization.
If a pickpocket meets a Holy Man, he will see only His pockets.
If you work on yoga, yoga will work on you.
Tapas is not a penance, it's a mental training to develop will power