More quotes by Leonardo da Vinci

"Our life is made by the death of others."
"All our knowledge has its origin in our perceptions"
"As a well spent day brings happy sleep, so life well used brings happy death."
"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."
"Study without desire spoils the memory, and it retains nothing that it takes in."