William Osler was a famous Canadian physician, and is usually referred to as ‘The Founding Father Of Modern Medicine’. He was also a great bibliophile, author, and historian. During the initial days of his career, he dreamt of being a minister but eventually drifted towards medicine. After completing his post-graduation in medicine he became a professor at the McGill University. He further became the Chairman of Clinical Medicine at the University of Pennsylvania and also founded the ‘Association of American Physicians’ which aimed at progressing medical science. He later became the chief physician of the John Hopkins Hospital where he also became the co-founder of the John Hopkins School of Medicine. He introduced the concept of medical bedding and clinical clerkship which helped medical students to have a practical experience. He also wrote many books on medical science which contribute to the McGill University’s Osler Library. He has been famous for his revolutionary ideas, thoughts, work, writings and significant contributions to medical science. We have collected his thoughts and quotes from various sources. Following are a few thought-provoking quotations and sayings by William Osler.