It is impossible to carry everyone you know to your future! Most will remain in your past!

Life is a house with millions of doors. Here is a good strategy of life: Open the doors, open as much as you can, open as much as possible, open the doors!

Realise well, proud little man that even the highest clouds don't shine! For above all things there lie brightest stars.

No one can save you, no one but your very reason! Therefore, improve your reason!

Use the rows, otherwise you either go nowhere or you are drifted to somewhere unwanted!

The demands of the science, of the ethics and of the reason are superior to the demands of the people!

With the softest hand, you can shape the hardest rocks!