“This enemy who attacks us at an unknown hour and steals our death when we are not yet detached from life — this enemy is a mouse.”

“I would like to die on Mars. Just not on impact.”

“Sometimes you just have to ask yourself 'Am I having fun?'”

“The more you know, the more you know you don't know.”

“An ounce of action is worth a ton of theory”

“When someone else's happiness is your happiness, that is love”

“The biggest risk is not taking any risk”

“The person who risks nothing does nothing, has nothing, is nothing, and becomes nothing”

“A clever person solves a problem. A wise person avoids it.”

“If you see me in a fight with a bear, pray for the bear”

“The enemy is fear. We think it is hate, but it is fear.”

“The greatest use of life is to spend it for something that will outlast it.”

“Don’t allow your mind to tell your heart what to do. The mind gives up easily”