Whenever there is a decline of righteousness, O Arjuna, and the rise of unrighteousness, then I manifest myself.
I reached in experience the nirvana which is unborn, unrivalled, secure from attachment, undecaying and unstained. This condition is indeed reached by me - deep, difficult to see, difficult to understand, tranquil, excellent, beyond the reach of mere logic, subtle, and to be realised only by the wise.
To become conscious we must become Self-aware in the awareness of the observer Self-observing.
Learn to make the whole world your own. No one is a stranger, my child; this whole world is your own.
If you desire to be pure, have firm faith, and slowly go on with your devotional practices without wasting your energy in useless scriptural discussions and arguments.
Many teachers will tell you to believe; then they put out your eyes of reason and instruct you to follow only their logic. But I want you to keep your eyes of reason open; in addition, I will open in you another eye, the eye of wisdom.
This is true knowledge: to seek the Self as the true end of wisdom always. To seek anything else is ignorance.

