Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.
- Leonardo da Vinci
Art is never finished, only abandoned.
- Leonardo da Vinci
The greatest deception men suffer is from their own opinions.
- Leonardo da Vinci
I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection. ‘Tis the business of little minds to shrink, but they whose heart is firm, and whose conscience approves their conduct, will pursue their principles unto death.
- Leonardo da Vinci
Nothing strengthens authority so much as silence.
- Leonardo da Vinci
There are three classes of people, those who see, those who see when they are shown and those who do not see.
- Leonardo da Vinci
