Stashed in: Kaizen, Quotes!, Leonardo, Never give up.
Source is "Ancora Imparo" - inscribed next to an image of Father Time in a child's carriage.
As quoted in Curiosities of Literature (1823) by Isaac Disraeli: http://en.wikiquote.org/wiki/Michelangelo
This Is How To Be Productive: 5 New Secrets Proven by Research by Eric Barker
Do one thing every day that scares you. ~Eleanor Roosevelt
The truth will set you free. But not until it is finished with you. ~David Foster Wallace, Infinite Jest
"If you want to build a ship... teach [people] to long for the endless immensity of the sea."