"The Mohammedan, who thinks that every ritual, every form, image or ceremony used by a non-Mohammedan is sinful does not think so when he comes to his own shrine, the Caaba. Every religious Mohammedan, wherever he prays, must imagine that he is standing before the Caaba. When he makes a pilgrimage there, he must kiss the black stone in the wall of the shrine. All the kisses that have been imprinted on that stone, by millions and millions of pilgrims, will stand up as witnesses for the benefit of the faithful on the last day of judgement. Then, there is the well of Zimzim. Mohammedans believe that whoever draws a little water out of that well will have his sins pardoned, and he will, after the day of resurrection, have a fresh body, and live forever."
January 1, 1970
https://en.wikiquote.org/wiki/Kaaba