Jamieson, Fausset and Brown on Joshua 4:10

Jos 4:10-13. The People Pass Over.

10. the priests which bare the ark stood in the midst of Jordan--This position was well calculated to animate the people, who probably crossed below the ark, as well as to facilitate Joshua's execution of the minutest instructions respecting the passage (Nu 27:21-23). The unfaltering confidence of the priests contrasts strikingly with the conduct of the people, who "hasted and passed over." Their faith, like that of many of God's people, was, through the weakness of nature, blended with fears. But perhaps their "haste" may be viewed in a more favorable light, as indicating the alacrity of their obedience, or it might have been enjoined in order that the the whole multitude might pass in one day.