"No doubt it is devastating. One cannot prove anything here, but it is possible to be convinced."
"How? By What?"
"By the experience of active love. Try to love your neighbors actively and tirelessly. The more you succeed in loving, the more you'll be convinced of the existence of God and the immortality of your soul. And if you reach complete selflessness in the love of your neighbor, then undoubtedly you will believe, and no doubt will even be able to enter your soul. This has been tested. It is certain."*
*Dostoevsky, Fyodor. The Brothers Karamozov. New York: Farrar, Straus and Giroux, 2002 edition, p 56.