You can get stuck in one state of mind or a general area of mind for a thousand lifetimes. Some states of mind afford better views than others.

The final entrance into Nirvikalpa Samadhi, into nirvana, God-realization, when you become the absolutely best friend of God, can only come when your love is completely pure.

A lot of people trash their subtle physical body with psychedelic drugs. While they do certainly give you experiences in altered levels of attention, you pay a price for it. They definitely screw up the subtle physical. Hatha Yoga can be good for that.

Will is guided by wisdom. Wisdom comes from introspection, looking inside yourself, probing, studying the wisdom of the teachers, the masters and bringing that into your mind.

Never be bored. Energy lives off of attention. When you are bored you get drained.

Thought control is the ability to direct mind and attention anywhere.

Linus Pauling would have us believe and perhaps correctly, that enough vitamin C will have us live another 20 or 30 years, I think the strongest power in the world is not vitamin C but the power of our own thoughts.