As you imagine Joshua being called to follow Moses, what gives you courage from the Lord’s words to him—and how does Joshua’s mission point you to Jesus Christ?
"1 Now after the death of Moses the servant of the Lord it came to pass, that the Lord spake unto Joshua the son of Nun, Moses’ minister, saying,
2 Moses my servant is dead; now therefore arise, go over this Jordan, thou, and all this people, unto the land which I do give to them, even to the children of Israel.
3 Every place that the sole of your foot shall tread upon, that have I given unto you, as I said unto Moses.
4 From the wilderness and this Lebanon even unto the great river, the river Euphrates, all the land of the Hittites, and unto the great sea toward the going down of the sun, shall be your coast.
5 There shall not any man be able to stand before thee all the days of thy life: as I was with Moses, so I will be with thee: I will not fail thee, nor forsake thee.
6 Be strong and of a good courage: for unto this people shalt thou divide for an inheritance the land, which I sware unto their fathers to give them.
7 Only be thou strong and very courageous, that thou mayest observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest prosper whithersoever thou goest.
8 This book of the law shall not depart out of thy mouth; but thou shalt meditate therein day and night, that thou mayest observe to do according to all that is written therein: for then thou shalt make thy way prosperous, and then thou shalt have good success.
9 Have not I commanded thee? Be strong and of a good courage; be not afraid, neither be thou dismayed: for the Lord thy God is with thee whithersoever thou goest." (Joshua 1:1–9)
And here's the commentary entitled: "God will be with me as I strive to be faithful to Him." :
"Imagine what it might have been like for Joshua to be called to replace Moses. Notice what the Lord said in Joshua 1:1–9 to encourage him. Think about the difficult challenges you face; what in these verses gives you courage?
The name Joshua (Yehoshua or Yeshua in Hebrew) means “Jehovah saves.” And the name Jesus comes from Yeshua. So as you read about Joshua, consider his role in leading the children of Israel across the Jordan River and into the promised land. How was his mission similar to what Christ does for us?"
What gives me courage in these verses is the Lord's promise that He will not fail me, nor forsake me; instead, He may prosper wherever I go, as long as I choose to be strong and very courageous, and that I observe to do according to all the law, turn not from it to the right hand or to the left.
Joshua's mission was similar to what Christ does for us in that He led the Israelites to the promised land, breaking barriers (the river Jordan and the walls of Jericho), just as Jesus broke the bands of death for us, so that we could enter our promised land (eternal life)