All thoughts start from emotions.

There is no result in nature without a cause; understand the cause and you will have no need of the experiment.

Avoid studies of which the result dies with the worker.

I love this site. It was lovingly hand-shaped it. Your soul transformed this into this art. It was perfect. I have tried to create another equal to it... but to no avail, so I will just have to paint the Sistine Chapel.

Avoid the precepts of those thinkers whose reasoning is not confirmed by experience.

When you put your hand in a flowing stream, you touch the last that has gone before and the first of what is still to come.

Therefore, O students, study mathematics and do not build without foundations.