Thomas Henry Huxley was a renowned 19th century English biologist. He opposed the biblical theory of creation and supported Charles Darwin’s theory of evolution. This got him the nickname "Darwin's Bulldog". In the early days of his career, he served in the ‘British Royal Navy’ and researched on various marine invertebrates. He sent his researches to his mentor who helped him in getting them published. His inputs in the study of marine biology, geology and the study of invertebrates, based on research and reason were remarkable. He was honored by the royal society at an early age of 26 for his contributions. He was retained by the navy to further research on the specimens he collected on the voyage. He further served as a lecturer and debated on his ideas of evolution. His debate at the Oxford was considered as a victory of Darwin’s ideas of evolution. He served as a professor at the Royal College of Surgeons and worked for the development of Marine Biology. His notable works include the essay ‘On the Physical Basis of Life’, which was inspired by his idea of life. Many awards and honors have been instituted after him, including the ‘Fellow of the Royal Society’. We bring to you a compilation of quotations and sayings which have been curated from the vast sea of his work and researches. Go through this collection of quotes and thoughts by Thomas Henry Huxley.