おなじ意味のことわざ

different strokes for different folks.

so many person, so many minds.

「十人十色」
の意味です。
もうひとつ、
He that falls in love with himself will have no rivals.
BenjaminFranklin(US statesman,diplomat,inventor, scientistand publisher,1706-90)
自己愛が強い人にはライバルはいない。
What does it mean? Is it talking about narcissism、or winner something like that?
Please tell me somebody～．