Quote by Ivan Pavlov

"Science demands from a man all his life. If you had two lives they would not be enough for you."

"The great orchestration of the conditional reflex is the highest nervous activity of animals."

"Consciousness is just how the brain labels the neural correlates of attention."

"Do not pursue pleasure, as you would chase a butterfly. Let pleasure come to you."

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."