The crying need of the time is to set up one universal religion for the entire mankind, which should be a compendium of all that is good in every religion. But is it possible? Owing to differences in temperaments and modes of thinking, it is well-nigh impossible to lay down rules of worship acceptable to all, and to direct their varying thought-currents into one channel. With all this diversity, there is yet one thing which is common in all humanity.It is the divine link with which the entire creation came into being, and is being sustained.

By Sant Kirpal Singh, from the book "Spirituality – what it is", chapter 9