“A sign of advancing age. You start obsessing about how much you have to get done in the time that you have left.”

“As his mother said, once you started worrying about the future, you started obsessing about the past.”

Cassandra Clare book City of Heavenly Fire

“Maturity is not a matter of age. You have matured when you are no longer concerned with showing how clever you are, and give your full attention to getting the job done right. Many never reach that stage, no matter how old they get.”

Thomas Sowell (1930) American economist, social theorist, political philosopher and author

“you don't have to be great to get started, but you have to get started to be great.”

Les Brown (1945) American politician

“When you reach my age, you realize you couldn't have done things very much better or much worse than you did them in the first place.”

Jorge Luis Borges (1899–1986) Argentine short-story writer, essayist, poet and translator, and a key figure in Spanish language literature

“They have worries, they're counting the miles, they're thinking about where to sleep tonight, how much money for gas, the weather, how they'll get there - and all the time they'll get there anyway, you see.”

Jack Kerouac (1922–1969) American writer

“The thing I like about having a company is the academic side. Then you forget about the academic side once you`ve done the administration and you start creating.”

Angelique Rockas South African actress and founder of Internationalist Theatre, London

“It is a waste of time to be angry about my disability. One has to get on with life and I haven't done badly. People won't have time for you if you are always angry or complaining.”

Stephen Hawking (1942–2018) British theoretical physicist, cosmologist, and author

“Balance your thoughts with action. — If you spend too much time thinking about a thing, you'll never get it done.”

Bruce Lee (1940–1973) Hong Kong-American actor, martial artist, philosopher and filmmaker

“Sometimes it is the artist's task to find out how much music you can still make with what you have left.”

Itzhak Perlman (1945) Israeli-American violinist and conductor