Raised in an educated and religious family, Dostoyevsky's beliefs changed through his life. In prison, he focused intensely on the figure of Christ and on the "New Testament", the only book allowed in prison. In a letter to the woman who had sent him the "New Testament", Dostoyevsky wrote that he was a "child of unbelief and doubt up to this moment, and I am certain that I shall remain so to the grave". He also wrote that "even if someone were to prove to me that the truth lay outside Christ, I should choose to remain with Christ rather than with the truth".