Exodus 17-18

“But Moses’ hands grew weary …” (17:12).  The Israelites could not prevail against the Amalekites without God’s help, and Moses could not hold up his staff without the help of Aaron and Hur.  As they faced their own limitations in the wilderness, God was teaching Moses and the people that they were not superhuman; they had to rely on God for every victory.  Moses, despite his wisdom and leadership, submitted to Jethro’s advice to delegate authority to other leaders in order not to “wear out” (ch 18).
“You are not able to do it alone” (18:18).  Our limitations are not hindrances, but gifts, as they cause us to lean on God and other people for help and strength.