"Moses spent the last half of his life in the company of people who made demands of him and complained about everything to him. Yet, he flourished, reaching old age with "his eyes undimmed and his vigor unabated" (Deut 34:7). How did he do it? Perhaps when people came to him with demands, instead of thinking to himself, "Why are these people bothering me?" he said to himself, "These people need me. They depend on me. I am not a superfluous old man; I am an important contributor to their lives." When they complained, he might of thought to himself: "They have come to me to share their dreams about how life could be better."
Rabbi H. Kushner (Overcoming Life's Disappointments)