Q: Is the psychological revolution you refer to sankhya yoga?
See, the word sankhya and the word yoga, both are two different expressions. Maybe I can say by the word 'psychological revolution' I mean sankhya, yoga, and something more. When you understand these ideas about the dream state, waking state and the superconscious state, every time the low mood or depression or disturbance comes to your inner space, bring this understanding into you.
Use this like a key and allow that psychological revolution to happen. You will see, first of all you will come out of the problem. Even if you come out of your suffering
2-3 times, you will have enough courage and energy to apply these techniques again and again, to evolve yourself again and again.
Beautifully Krishna says, let you raise yourself by yourself. If you raise yourself by yourself you are the best friend for you. If you don't raise yourself by yourself you are the worst enemy for you.