Author Edward Dolnick says that in the 17th century, atheism was unthinkable. "These men had little trouble reconciling their faith with the science they were developing. As Dolnick says, they took "their own deepest beliefs and assigned them to nature." And their deepest belief was in the existence of God. In their minds, scientific investigation was a way to understand the mind of God and honor his work. As new generations of scientists probed the universe, they found that it ran even more smoothly than Newton and his contemporaries thought."