New International Version
If you carefully observe all these commands I am giving you to follow to love the Lord your God, to walk in obedience to him and to hold fast to him then the Lord will drive out all these nations before you, and you will dispossess nations larger and stronger than you. Every place where you set your foot will be yours: Your territory will extend from the desert to Lebanon, and from the Euphrates River to the Mediterranean Sea. No one will be able to stand against you. The Lord your God, as he promised you, will put the terror and fear of you on the whole land, wherever you go.
What is the if and then in your life? When you read this the first thing is the if. If you will obey. That is the first thing in our life God wants no different than we want our kids to do, is obey. When we do even our enemies will fear us. Now I like thinking that the ones who are against me fear me. Not because of me but because of Him. There is a song that says when they see who is standing behind me. Well, when we obey the word of God He can stand with us through anything.