Ivan Pavlov

“Don't become a mere recorder of facts, but try to penetrate the mystery of their origin.”

“It goes without saying that the desire to accomplish the task with more confidence, to avoid wasting time and labour, and to spare our experimental animals as much as possible, made us stric...”

“Our success was mainly due to the fact that we stimulated the nerves of animals that easily stood on their own feet and were not subjected to any painful stimulus either during or immediatel...”