Here are some be nice quotes that I found:

- "It is nice to be important, but it's more important to be nice." - John Templeton
- "In a world where you can be anything, be kind." - Unknown
- "Be kind whenever possible. It is always possible." - Dalai Lama
- "Be honest, be nice, be a flower not a weed." - Aaron Neville
- "Love your haters. They're your biggest fans." - Kanye West

I hope this helps!