It requires wisdom to ...

It requires wisdom to understand wisdom: the music is nothing if the audience is deaf.
It requires wisdom to understand wisdom: the music is nothing if the audience is deaf.

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

Where all think alike, no one thinks very much.
Ideals are an imaginative understanding of that which is desirable in that which is possible.
No mariner ever enters upon a more uncharted sea than does the average human being born in the 20th century. Our ancestors know their way from birth through eternity; we are puzzled about the day after tomorrow.
What the public does is not to express its opinions but to align itself for or against a proposal. If that theory is accepted, we must abandon the notion that democratic government can be the direct expression of the will of the people. We must abandon the notion that the people govern. Instead, we must adopt the theory that, by their occasional mobilizations as a majority, people support or oppose the individuals who actually govern. We must say that the popular will does not direct continuously but that it intervenes occasionally.
We must abandon the notion that the people govern. Instead, we must adopt the theory that, by their occasional mobilisations as a majority, people support or oppose the individuals who actually govern.