For YHWH your God dried up the waters of the Jordan for you until you passed over, as YHWH your God did to the Red Sea, which he dried up for us until we passed over, so that all the peoples of the earth may know that the hand of YHWH is mighty, that you may fear YHWH your God forever.
Joshua 4:23-24

God does miracles so that the whole world will know that he is all powerful, but only those who fear him appropriately are his people.

There's a nice little #chiasm in this passage too:
..YHWH and the Jordan
....YHWH and the Red Sea
....The world and YHWH
..You and YHWH

#biblepatterns