Changing your attitude is pretense - you cannot keep it up forever. The yogic system is about fundamental transformation - that is what ultimately counts.

Hatha Yoga is not body-bending business. It is about taking charge of the way you think, feel, and perceive life.

When you experience everything as a part of yourself, you are in Yoga. That is liberation, that is mukti, that is ultimate freedom.  

This is a technology where without external input, you create a chemistry of blissfulness within you.

What we refer to as Yoga is a technology to make your energies function by choice, not by compulsion or fixed patterns.