The most likely author of Joshua 1:9 is Joshua himself. According to evangelical Christian belief, Joshua was chosen by God to succeed Moses as the leader of the Israelites and to lead them into the Promised Land. Joshua is considered a faithful and courageous man who relied on God’s strength and guidance.

In Joshua 1:9, Joshua is speaking to the Israelites, encouraging them to be strong and courageous as they prepare to enter the land that God has promised to them. He reminds them that God is with them wherever they go and that they should not be afraid or discouraged.

From an evangelical Christian perspective, Joshua 1:9 is a powerful and inspiring verse that reminds believers of God’s presence and faithfulness in their lives. It encourages them to trust in God and to be strong and courageous in the face of challenges and obstacles.

Overall, evangelical Christians see Joshua as a key figure in the history of Israel and as a symbol of faith, obedience, and courage. His words in Joshua 1:9 serve as an important reminder of God’s promises and his presence in the lives of believers.