"Long ago, it was said, "Blessed are the obstacles, by them we grow." Thus, also in the most ancient Hindu scriptures it is said that the Kali Yuga is particularly useful for spiritual perfectment, and that which in the Satya Yuga could only be achieved through hundreds of thousands of incarnations can be attained in Kali Yuga in a few lives... But, of course, here as ever, only strong spirits who love to overcome difficulties are particularly successful, whereas lukewarm ones, who choose the easiest and irresponsible path, are destined to hard toil, which will finally lead them to a most difficult path. Therefore, profoundly just and scientific are the words from the Apocalypse, "So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.""
January 1, 1970
https://en.wikiquote.org/wiki/Kali_Yuga