Jos 1:9 Have I not commanded you? Be strong and courageous. Do not be frightened, and do not be dismayed, for the LORD your God is with you wherever you go.”
Deuteronomy 31:7-8 Then Moses summoned Joshua and said to him in the sight of all Israel, “Be strong and courageous, for you shall go with this people into the land that the LORD has sworn to their fathers to give them, and you shall put them in possession of it. It is the LORD who goes before you. He will be with you; he will not leave you or forsake you. Do not fear or be dismayed.”
Judges 6:14 And the LORD turned to him and said, “Go in this might of yours and save Israel from the hand of Midian; do not I send you?”
Acts 4:19 But Peter and John answered them, “Whether it is right in the sight of God to listen to you rather than to God, you must judge,
Genesis 28:15 Behold, I am with you and will keep you wherever you go, and will bring you back to this land. For I will not leave you until I have done what I have promised you.”
Deuteronomy 20:1 “When you go out to war against your enemies, and see horses and chariots and an army larger than your own, you shall not be afraid of them, for the LORD your God is with you, who brought you up out of the land of Egypt.
Psalms 27:1-2 The LORD is my light and my salvation; whom shall I fear? The LORD is the stronghold of my life; of whom shall I be afraid? When evildoers assail me to eat up my flesh, my adversaries and foes, it is they who stumble and fall.
Jeremiah 1:7-8 But the LORD said to me, “Do not say, ‘I am only a youth’; for to all to whom I send you, you shall go, and whatever I command you, you shall speak. Do not be afraid of them, for I am with you to deliver you, declares the LORD.”
Psalms 46:7 The LORD of hosts is with us; the God of Jacob is our fortress.
Let not the sense of thine own infirmities dishearten thee; God is all-sufficient. I have commanded, called, and commissioned thee to do it, and will be sure to bear thee out in it. (Henry)
Have not I commanded thee?…. The above things, to go over Jordan with the people into the land of Canaan, and to observe the law of Moses in all things, and to be of good courage, which is again repeated; consider who it is that has given these orders and instructions, the great Jehovah, the everlasting I AM, who is faithful to his promises, and able to perform. The consideration of which would serve to animate him to the work he was called unto, to encourage his faith in God, to engage in his service cheerfully and readily: be strong, and of a good courage; be not afraid, nor be thou dismayed; at his enemies, numerous and powerful, nor discouraged at anything in himself, any unfitness for such service, as he might think, or at any difficulties he might fear from the people he had the government of, and was to lead on; it was enough that the divine Presence was promised him. (Gill)
When facing a pending war and knowing the enemy is bigger and stronger than you, I think, would give a bit of fear into your mind. Being told to go into the land they occupy and take it away from them because I, God, have given it to you, is a big faith tester isn’t it. Joshua is told to be strong and courageous, not to be frightened, or be dismayed. Why? Because God is with him. We can look back at all of the examples given in the bible where God displayed His awesome power. Faith casts out all fear.
It is hard to cast out all fear if our understanding and knowledge of God is limited. Many doubts will come into our minds when we are not practicing and believing in His presence, love, power, and promises. Faith in God grows within us as we mature in His Word. We start to denounce self-reliance and cling to relying in Him, His leading, His power, His purposes, and His will. I see no other way to overcome fear, doubt, anger, and worry than to spend intentional time in His Word for the single purpose of knowing Him more and more, trusting in Him more and more, relying on Him more and more, believing in Him more and more, and discerning His hand in the world around us more and more.
There is a peace that passes all human understanding that comes from God’s Word. It is a place of hope, refuge, joy, purpose, holy promises, and rest.