The list author says: "- The great mystics had to tell all men that the world perceived by the eyes of the body is doubtless real, but that there is something else, and that this something is no mere possibility or probability, like the conclusion of an argument, but the certainty of a thing experienced: here is one who has seen, who has touched, one who knows. And yet these were but the tentative beginnings of an apostolate. The enterprise was indeed discouraging: how could the conviction derived from an experience be handed down by speech? And, above all, how could the inexpressible be expressed? But these questions do not even present themselves to the great mystic. He has felt truth flowing into his soul from its fountainhead like an active force. He can no more help spreading it abroad than the sun can help diffusing its light. Only, it is not by mere words that he will spread it. For the love which consumes him is no longer simply the love of man for God, it is the love of God for all men. Through God, in the strength of God, he loves all mankind with a divine love.
Bergson - The Two Sources of Morality and Religion -"