This quote comes from French mathematician, physicist, inventor, writer, and Christian philosopher Blaise Pascal's book Pensées. Pascal was a child prodigy who eventually began to work with the natural and applied sciences, where he studied and contributed to the study of fluids, pressure, vacuum. He also invented the mechanical calculator and influenced the development of modern economics and social science.
After the death of his father in 1654 he devoted himself to theology and philosophy. That same year he wrote his two most famous works: Lettres provinciales and Pensées. Pensées, which translates to "thoughts," was a defense of Christianity.