“…it is impossible to make these building matters understandable if one doesn’t see them drawn out, and even in a drawing it is difficult to take in.  And no one can understand [building] if he can’t interpret [drawings], so that it takes more effort to interpret a drawing than to make one.  This may seem unreasonable [but it is so] since many people will draw for exercise without really knowing what they are doing.” – – Filarete [c. 1400 – c. 1469], a Florentine Renaissance architect, sculptor and architectural theorist

 

Antonio di Pietro Averlino also "Averulino", known as Filarete (from φιλάρετος, Greek for "lover of excellence"),

Antonio di Pietro Averlino also “Averulino”, known as Filarete (from φιλάρετος, Greek for “lover of excellence”),