He has the most who is most content with the least.

One original thought is worth a thousand mindless quotings

Antisthenes used to say that envious people were devoured by their own disposition, just as iron is by rust. Envy of others comes from comparing what they have with what the envious person has, rather than the envious person realising they have more than what they could have and certainly more than some others and being grateful. It is really just an inability to get a correct perspective on their lives.

All things are in common among friends.

Dogs and philosophers do the greatest good and get the fewest rewards.

I like best the wine drunk at the cost of others.

When asked what was the proper time for supper: If you are a rich man, whenever you please; and if you are a poor man, whenever you can.