The Prince by Niccolo Machiavelli Chapter 26 Page 4

but men, not one of whom had so great an opportunity as now presents itself to you. For their undertakings were not more just than this, nor more easy, nor was God more their friend than yours. The justice of the cause is conspicuous; for that war is just which is necessary, and those arms are sacred from which we derive our only hope. Everywhere there is the strongest disposition to engage in this cause; and where the disposition is strong the difficulty cannot be great, provided you follow the methods observed by those whom I have set before you as models.

But further, we see here extraordinary and unexampled proofs of Divine favour. The sea has been divided; the cloud has attended you on your way; the rock has flowed with water; the manna has rained from heaven; everything has concurred to promote your greatness.