Simplicity is the ultimate sophistication.
A good teacher protects his pupils from his own influence.
Every aquarium will eventually leak.
Love make us poets, and the approach of death should make us philosophers.
If you don't know where you're from, you'll have a hard time saying where you're going.
An understanding of the natural world is a source of not only great curiosity, but great fulfilment.
Challenges are gifts that force us to search for a new center of gravity. Don't fight them. Just find a new way to stand.
I know I am but mortal and so therewhilst prepare myself for death, whensoever it shall please God to send it.
As our case is new, we must think and act anew.
Without courage, wisdom bears no fruit.
It is easy to be brave at a safe distance.
Take care of the pieces well. The whole will take care of itself.
In the midst of movement and chaos, keep stillness inside of you.
Property is surely a right of mankind as real as liberty.
Intellectuals solve problems, geniuses prevent them.
Do not say a little in many words, but a great deal in few!
The greatest power we have is the power of choice.
The first thing you'll have to do, is the last thing you wished.
Experience is the only prophecy of wise men.
He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.
A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.