Wisdom is not attained by ...

Wisdom is not attained by years, but by ability
Wisdom is not attained by years, but by ability
 Plautus

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

Nothing but heaven itself is better than a friend who is really a friend.
 Plautus
Men understand the worth of blessings only when they have lost them.
 Plautus
Nothing is there more friendly to a man than a friend in need.
 Plautus
Let us celebrate the occasion with wine and sweet words.
 Plautus
I suspect that hunger was my mother.
 Plautus