Musar על שמואל ב 6:20

Michal, for rebuking David for dancing outside before the Ark was punished by not having children during her lifetime and dying in childbirth (Shmuel II 6:20).

So too in our case, for no one recognizes the illness of the evil inclination and its powers except for the Creator who created it. And He Himself cautioned us that the only remedy for it is Torah. Who then will abandon it, take something else instead and expect to live? Certainly the darkness of the physical will advance and strengthen over him level after level, without his realizing it until he finds himself immersed in evil, so distantly far from the truth that even thoughts of seeking [the truth] will not enter his heart.

Although this detrimental factor we have discussed is the most prevalent, nevertheless it is the easiest to escape from, for he who wants to escape it.