Things I've learned and try to remember, although my memory ain't what it used to be...
The staunch refusal to learn never serves a prevailing end. (Read that as: your parents are always right.)
The dishes simply don't do themselves no matter how you may beg and pray. The regular, the mundane, the tedious ~ they tend the in-field of a life that cannot enjoy an over-the-wall ride without them. If it's a bother it's likely a must. Smile and step to the plate with intention.
You will be humbled. Know it early and receive it willingly. Humility in lifetime doses changes you for the better so you arrive in the next life worthy.
Then, too, know your arrogance and accept that others are not fooled by your trickery. They see it. Wear that with your humility. These are your shades and they make you rich and interesting.
Your circumstances do not, and must not, dictate your dreams. Dream as immensely as your imagination allows, and then some. This fuels you on the dullest days.
When you are convinced of your brother's error step away and look again. He is your mother's son. Find love for him first and always before your interference.
We all fail. That will never change. Find triumph inside, over and around. It is there and it can lend you great courage, even and sound.
You can change; you cannot change others.
Closed eyes see things they cannot discern when pre-disposed to look. The closed mind serves no purpose at all.
Sometimes it is too late. Unless everything happens for a reason. It does. Trust doesn't carry the walking man.
If it is your job to be the peacemaker in that place where not one soul seeks peace, be the peaceful soul.
Favor your faults as you would a small child; always there is room to grow.
Marry well, if you feel you must, not based on gender or politic or religion, but on connection and honesty. These survive.
Touch, taste, revel and rebel all with equal reverence for their consequences.
Know, yes. But never fail in knowing that you know nothing at all. That is how you live.