In so far as your metaphysical beliefs are implicit, you vaguely interpret the past on the lines of the present. But when it comes to the primary metaphysical data, the world of which you are immediately conscious is the whole datum.
This criticism applies equally to a science or to a religion which hopes to justify itself without any appeal to metaphysics. The difference is that religion is the longing of the spirit that the facts of existence should find their justification in the nature of existence. “My soul thirsteth for God,” writes the Psalmist.
But science can leave its metaphysics implicit and retire behind our belief in the pragmatic value of its general descriptions. If religion does that, it admits that its dogmas are merely pleasing ideas for the purpose of stimulating its emotions. Science (at least as a temporary methodological device) can rest upon a naive faith; religion is the longing for justification. When religion ceases to seek for penetration, for clarity, it is sinking back
