The Creative Principle [of Science]

It Is Also A Natural Thing For A Serious Young Man That He Should Form For Himself As Precise An Idea As Possible Of The Goal Of His Desires.

It Would Be Better If You Began To Teach Others Only After You Yourself Have Learned Something.

God Is A Scientist, Not A Magician.

Fantasie Is Belangrijker Dan Kennis, Want Kennis Is Begrensd.

The High Destiny Of The Individual Is To Serve Rather Than To Rule.