Be ye therefore very courageous to keep and to do all that is written in the book of the law of Moses,.... To observe which required spiritual strength, fortitude of mind, a holy courage, a firm and fixed resolution, and particularly to destroy the Canaanites required in that book, and to abstain from all communion and fellowship with them: that ye turn not aside therefrom, to the right hand or the left; See Gill on Jos 1:7.