I received my doctorate from the University of Vienna in 1910.

After the first exams, I switched to the Faculty of Philosophy and studied Zoology in Munich and Vienna.

Nature has unlimited time in which to travel along tortuous paths to an unknown destination. The mind of man is too feeble to discern whence or whither the path runs and has to be content if it can discern only portions of the track, however small.

I have been a Professor Emeritus since 1958, and have continued my scientific studies.

I received my doctorate from the University of Vienna in 1910.

The ant is a collectively intelligent and individually stupid animal; man is the opposite.

The bee's life is like a magic well: the more you draw from it, the more it fills with water