Charles Darwin describes how he lost his religious faith through becoming interested in natural science. As a student, he met scientists who discussed evolutionary ideas, exposing him early on. A voyage on the HMS Beagle from 1836 to 1839 allowed Darwin to study geology in different places and cultivate his mind. He began to doubt the literal truth of the Bible and found it no more credible than other religions. His doubts in his faith grew until he became a total disbeliever, seeing the doctrine of punishment of non-believers as terrible.