"Watches" to protect, to reward or punish us. He watches continually; He
not only watches, but keeps us alive. God might have created us and then
paid no more attention to us; but if He had done so, we should have
fallen back again into nothingness. Therefore He preserves us every
moment of our lives. We cannot draw a breath without Him. If a steam
engine be required to work ceaselessly, you cannot, after setting it in
motion, leave it henceforth entirely to itself. You must keep up the
supply of water and fire necessary for the generation of steam, you must
oil the machinery, guard against overheating or cooling, and, in a word,
keep a constant watch that nothing may interfere with its motion. So
also God not only watches His creatures, but likewise provides for them.
Since we depend so much upon Him, is it not great folly to sin against
Him, to offend, and tempt Him as it were? There are some birds that
build their nests on the sides of great rocky precipices by the
seacoast. Their eggs are very valuable, and men are let down by long
ropes to take them from the nest. Now while one of these men is hanging
over the fearful precipice, his life is entirely in the hands of those
holding the rope above. While he is in that danger do you not think he
would be very foolish to tempt and insult those on whom his life
depends, when they could dash him to pieces by simply dropping the rope?
While we live here upon earth we are all hanging over a great precipice,
namely, eternity; God holds us by the little thread of our lives, and if
He pleased to drop it we should be hurled into eternity. If we tempt or
insult Him, He might drop or cut the thread while we are in mortal sin,
and then, body and soul, we go down into Hell.

18 Q. Does God know all things?
A. God knows all things, even our most secret thoughts, words, and
actions.