Don't take them as the holy bible, EVER.
Don't even take my things as the holy bible.
Just take chunks of info from various sources and come to believe what you will from everything; never trust just one standpoint in a situation!
Many psychologists are biased and know how to sway people towards views that either make them richer or makes the person feel better without actually being fair.
I'm just saying that a good amount of psychologists I see pander to emotion more than logic, but there are some highly intelligent psychologists who nail brain behavior, although those psychologists are usually the ones who don't feel like "guiding others to happiness" or ones like Sigmund Freud.
The truth about psychology is that the human brain isn't meant to be happy, it's meant to be depressed by default.
But happiness feels great, and should be achieved through truthful, honestly optimistic means.
Not delusion like placing blame on others, drugs, emotional music, venting, or other things that deal so closely with your issues unless you're confident that it will desensitize or exterminate your issue(s), not just dance around and practically praise your issues, or feel entitled to sympathy.
Remember: being tough is better than being emotional by default, but don't be too tough to too emotional.
I don't mean abusive or other types of pseudo-tough, I mean tough as in enduring through pain, not taking stuff personally, and having an open mind.
Don't live in lala land or be a non-sentient drone, just find your personality, your true personality, and learn how to just LIVE without having to constantly have issues with things or people, without having to use 'medicine' like music to deal with that stuff.
Being abusive is even weaker than taking abuse.
"I'd rather be the one pushed over than pushing over. Sometimes, it's better to just stand still, that way nobody gets hurt or taken advantage of. But there will be cars, trains, and lots of dangerous obstacles others will walk into, and sometimes you have to push them to safety; sometimes, a car will steer off path towards you, and another person will have to push you to safety. So just go out and take the risks, but don't take things too far whether for yourself or for others." - Me, 2017
Just be happy and relax, trying to never let yourself down over stupid shit.