Excessive reservations and paralyzing despondency have not helped the sciences to advance nor are they helping them to advance, but a healthy optimism that cheerfully searches for new ways to understand, as it is convinced that it will be possible to find them.
"I shall mention Nissl’s name as often as scientific works by him on the topic under discussion are known to me. However, Nissl’s share in these studies does not end with that. The amicable scientific interactions which I was allowed to entertain with him over the last 15 years have given me so much stimulation that I must concede – to give but one example – that none of the following ideas that might enhance our knowledge has been conceived without his direct or indirect participation. This does not preclude the fact that Nissl may well disagree with some views expressed here.”