evidence: He argued that the knowledge comes solely from how our five senses see the world, saying in An Essay concerning Human Understanding (1690): [...] Quote 14 "It is beyond a doubt that all our knowledge begins with experience" – Immanuel Kant The German philosopher Immaneul Kant is widely accepted as one of the most influential thinkers of the 18th century. He is remembered for his unique idea that the world we experience around us is simply appearance and we can never really know the true nature of things.