Act with kindness, but do not expect gratitude.

Confucius
Profession: Philosopher
Nationality: Chinese

Some suggestions for you :
Mens natures are alike it is their habits that carry them far apart.
Don't be concerned others not appreciating you. Be concerned about your not appreciating others.
We should keep the dead before our eyes, and honor them as though still living.
If things far away don't concern you, you'll soon mourn things close at hand.
If you make a mistake and do not correct it, this is called a mistake.