The arithmetical symbols are written diagrams and the geometrical figures are graphic — David Hilbert
Behold the crucifix; what does it symbolize? Pallid incompetence hanging on a tree. — Anton Szandor LaVey
The symbol in the dream has more the value of a parable: it does not conceal, it teaches. — Carl Jung
Secondly, figures, the symbols of numerical magnitude, are frequently also the symbols — Ada Lovelace