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."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"