Having knowledge but lacking the power to express it clearly is no better than never having any ideas at all.
PericlesFor the whole earth is the tomb of famous men; not only are they commemorated by columns and inscriptions in their own country, but in foreign lands there dwells also an unwritten memorial of them, graven not on stone but in the hearts of men.
PericlesThose who can think, but cannot express what they think, place themselves at the level of those who cannot think.
PericlesFor grief is felt not so much for the want of what we have never known, as for the loss of that to which we have been long accustomed.
Pericles