Johann Wolfgang von Goethe   (1749-1832)

What you don't feel, you will not grasp by art,
Unless it wells out of your soul
And with sheer pleasure takes control,
Compelling every listener's heart.
But sit - and sit, and patch and knead,
Cook a ragout, reheat your hashes,
Blow at the sparks and try to breed
A fire out of piles of ashes!
Children and apes may think it great,
If that should titillate your gum,
But from heart to heart you will never create.
If from your heart it does not come.

From Faust I