Dumbness and silence are two different things.
Let truth be a banner big enough to hide the man who holds it up.
A tree nowhere offers a straight line or a regular curve, but who doubts that root, trunk, boughs, and leaves embody geometry?
Ignorance may find a truth on its doorstep that erudition vainly seeks in the stars.
Discovery begins by finding the discoverer.
Some young folks have wind-fall minds, prematurely detached from the tree of knowledge for a life-long sourness and pettiness.