Through G-d’s direction Moshe chose Joshua to be the next leader of us. While Moshe relied on miracles Joshua was a natural leader.
The reason why Joshua was successful he followed the example of Moshe. Moshe was led by G-d thus Joshua became selfless by following the example of Moshe and Joshua conquered the city of Jericho.
Joshua learned from Moshe to trust G-d, learn from the Torah and most important of all listen and then follow G-d’s direction.
G‑d said to Moses, “Take Joshua son of Nun, a man of spirit, and lay your hand upon him.” Numbers 27:18
The Rebbe explains: “Joshua was chosen as Moses’ successor by virtue of his consummate diligence in absorbing Moses’ instruction – both from the Torah that Moses taught and through Moses’ personal conduct. The difference in their leadership was that Moses’ was largely based on miracles whereas Joshua’s was conducted naturally. Therefore, it was specifically through Joshua’s leadership that the purpose of Creation – to sanctify the natural, mundane world – was fulfilled. But Joshua succeeded only because he was a selfless reflection of Moses; his selflessness enabled the miraculous nature of Moses’ leadership to carry over into his own, natural leadership. Thus, Joshua’s first conquest, the city of Jericho, occurred miraculously.
From Joshua we learn to be fully committed both to humbly absorbing and transmitting the heritage and lessons of the Torah as they have been handed down to us by our predecessors, and to applying the Torah’s teachings to the novel situations of our generation.1 Hitva’aduyot 5747, vol. 3, pp. 191–195.
This lesson teaches me that if I want live a G-dly life I must follow the instruction manual that G-d gave me in HIS Torah.
Die to self, become selfless and follow the example of the L-rd of my life Yeshua. To paraphrase Yeshua I didn’t come to do away with the instruction manual I came fulfill it.