The Beis Ahron of Karlin writes that Torah and Mitzvos need to feel fresh and new in our eyes every day. So he asks, how can we instill this in our hearts? Answers the Beis Ahron, we can learn a Kal Ve'Chocher from the Yetzer Hara himself. The Yetzer Hara tempts a person to sin and he listens to him and falls. But after the person sins, he becomes disgusted with the desire (and resolves never to fall again). And yet the very next day, the Yetzer Hara tempts him once again with this same desire and he renews the desire in his heart R"L, just like before. So how much more so, the Torah and Mitzvos, which are the life source of all the worlds and a person's very life - should feel new to a person every day!
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