God set the rainbow in the cloud, for a token.

True; but the important matter is that GOD set it there.

Important? Yes. What more important than to know that the flood
did not come of itself, that the rainbow did not come of itself, and
therefore that no flood comes of itself, no rainbow comes of itself;
nothing comes of itself, but all comes straight and immediately from
the one Living Lord God?

A man may say, But the flood must have been caused by clouds and
rain; and there must have been some special natural cause for their
falling at that place and that time?

What of that?

Or that the fountains of the great deep must have been broken up by
natural earthquakes, such as break up the crust of the earth now.
What of that?

Or that the rainbow must have been caused by the sun's rays shining
through rain-drops at a certain angle, as all rainbows are now.
What of that? Very probably it was: but if not, What of that?
What we ought to know, and what we ought to care for is, what the
Bible tells us without a doubt, that however they came, God sent
them. However they were made, God made them. Their manner, their
place, their time was appointed exactly by God for a MORAL purpose.
To do something for the immortal souls of men; to punish sinners; to
preserve the righteous; to teach Noah and his children after him a
moral lesson, concerning righteousness and sin; concerning the wrath