Tapas is not a penance, it's a mental training to develop will power
When body, breath, and mind work together in harmony to achieve a spiritual goal, that is yoga.
If you work on yoga, yoga will work on you.
The body is a boat that carries the soul in the ocean of the world. If it is not strong, or it has a hole, then it cannot cross the ocean, so the first duty is to fix the boat.
If a pickpocket meets a Holy Man, he will see only His pockets.
Life is not a burden, but we make it one when we refuse to accept things as they are.