The greatest discovery of my generation is that a human being can alter his life by altering his attitudes of mind.

 No. You remain fully aware and in control of your actions and thoughts. 

 No, it requires your consent and active participation. 

 You can always bring yourself out of a hypnotic state, which is similar to deep daydreaming.

No. Although relaxation is common, you can be hypnotized while in a state of high emotion. 

 Actually, most people recall some or all of the session. 

Most people are able to experience some level of hypnosis, though susceptibility varies.
 

 Yes, it is widely considered a safe, complementary therapy. 

It is a technique where you bring yourself into a trance for self-improvement, often taught to reinforce therapy. 

This varies depending on the goal, but it is generally considered a short-term approach. 

Most describe it as a deeply pleasant, relaxed, and focused state. 

 A small number of people might feel temporary grogginess after a session.