Don't let your mind stay the same.

Hanging out with friends for...?

Enhancing the state of mind

--> again and again ---> profound transformation

If you really understand what your mind can do, you'd be uncomfortable -Lil B.

Rationality

It is believed by some philosophers (notably A.C. Grayling) that a good rationale must be independent of emotions, personal feelings or any kind of instincts. Any process of evaluation or analysis, that may be called rational, is expected to be highly objective, logical and "mechanical". If these minimum requirements are not satisfied i.e. if a person has been, even slightly, influenced by personal emotions, feelings, instincts or culturally specific, moral codes and norms, then the analysis may be termed irrational, due to the injection of subjective bias.

on the beautiful thing called rationality

Clear, trustworthy minds. Build that relationship with them.