"Live quietly, talk gently, act wisely"

That's a good recipe for a good person, but not the only one - well, you wouldn't just want one sort of person, would you.

Here is another:

"O Cormac, grandson of Conn." said Carbery, "what were your habits when you were a lad?"

"Not hard to tell," said Cormac.

I was a listener in woods,
I was a gazer at stars,
I was blind where secrets were concerned,
I was silent in a wilderness,
I was talkative among many,
I was mild in the mead-hall,
I was stern in battle,
I was gentle towards allies,
I was a physician of the sick,
I was weak towards the feeble,
I was strong towards the powerful,
I was not close lest I be burdonsome,
I was not arrogant though I was wise,
I was not given to promising things though I was strong,
I was not venturesome though I was swift,
I did not deride the old though I was young,
I was not boastful though I was a good fighter,
I would not speak about anyone in their absence,
I wopuld not reproach, but I would praise,
I would not ask, but I would give."