Being my brother’s or sister’s keeper

What does it mean to be your brother’s or sister’s keeper?
It is about having someone’s back, caring for them, supporting them in the struggles, not judging them, but loving them, keeping their secrets safe, and relying on each other to make it through the struggles in the day to day life.
…Taking the time to listen to them and understanding where they come from, walking beside then in the good times and the bad, and holding each other acountable.
…Lifting each other up and praising them in the good, crying with them in the bad, and standing tall beside them through it all.
…Being there for them through thick and thin and never letting them go, no matter what.
Being your brother’s or sisters’s keeper means to give yourself selflessly to them, in order to help lift their lives up without thought, recognition, or ulterior motives, but strictly out of the love and caring for one another.
Proverbs 27:17 NIV
As iron sharpens iron, so one person sharpens another.