31. Since God is everywhere, why do we not see him? Upon leaving the Earth, shall we see him? Such questions are daily posed.
The first is not difficult to solve. Our material organs have limited perceptions, which render them powerless to see certain things, sometimes even material objects. Thus certain fluids escape our view, as also that of our analytical instruments. However, we do not doubt their existence. We see the effects of the pestilence; but we do not see the fluid which transports it. We see bodies move under the influence of gravity; but we do not see this force.