Variant: When it is not in our power to follow what is true, we ought to follow what is most probable.
Rene DescartesI did not imitate the skeptics who doubt only for doubting's sake, and pretend to be always undecided; on the contrary, my whole intention was to arrive at a certainty, and to dig away the drift and the sand until I reached the rock or the clay beneath.
Rene Descartes