"Be strong and courageous. Do not be afraid; do not be discouraged, for the LORD your God will be with you wherever you go." (Joshua 1:9)
Joshua picks up directly from the death of Moses. God commissions Joshua to lead Israel across the Jordan into the promised land, and the commission comes wrapped in the most repeated command in the book: be strong and courageous, be strong and very courageous, be strong and courageous, do not be afraid or discouraged. The command recurs four times in the opening chapter because the task is genuinely terrifying: crossing a flooded river into hostile territory, with an untested leader replacing the incomparable Moses. The ground of the courage is not Joshua's own capability but the divine presence: Be strong and courageous. Do not be afraid; do not be discouraged, for the LORD your God will be with you wherever you go.
God instructs Joshua to meditate on the Book of the Law day and night and to be careful to do everything written in it; then he will be prosperous and successful. The Catechism identifies this command as the foundational practice of Lectio Divina: the daily immersion in the word of God that produces the wisdom and strength needed for every task God assigns (CCC 2708). Joshua passes the commission to the people and the officers, and the people answer: just as we obeyed Moses in everything, so we will obey you. Only be strong and courageous.
Brothers and sisters, be strong and courageous. The command is given four times because once was not enough for Joshua and once is not enough for us. Name the specific crossing you are afraid of today, the Jordan that seems flooded and the territory that seems hostile. Then receive the command again: the LORD your God is with you wherever you go. Not sometimes. Wherever.
Lord God, you commanded Joshua to be strong and courageous because you would be with him wherever he went. Give us the same courage for our own crossings. Meditate your word in us day and night. Through Christ our Lord. Amen.