Henri Jean Fabre (1823-1915), considered the "Father of Modern Entomology," was a famous biologist who pioneered unprecedented studies of insects in their habitats.  He also authored numerous popular textbooks, including Souvenirs entomologigues, 1879-1907.  Henri Jean Fabre, who was a personal friend of Louis Pasteur, asserted concerning God:

"Without Him I understand nothing; without Him all is darkness... Every period has its manias.  I regard Atheism as a mania.  It is the malady of the age.  You could take my skin from me more easily than my faith in God."  - Henry M. Morris, Men of Science - Man of God (El Cajon, CA: Master Books, Creation Life Publishers, Inc., 1990), pp. 62-63.