[W]e can pore over him,
dissect him, marvel or carp at him. But in the end there remains something that
will not be seized. That is why, each time a
Mozart work begins . . . we composers listen with a certain awe and wonder, not
unmixed with despair. The wonder we share with everyone; the despair comes from
the realization that only this one man at this one moment in musical history
could have created works that seem so effortless and so close to perfection.
Here is the Commentary article offering the quotation.