All wish to be learned, but no one is willing to pay the price.
All wish to possess knowledge, but few, comparatively speaking, are willing to pay the price.
Many individuals have, like uncut diamonds, shining qualities beneath a rough exterior.
Censure pardons the ravens but rebukes the doves. [The innocent are punished and the wicked escape.]
One globe seemed all too small for the youthful Alexander.
No one every suddenly became depraved.