Do you want to know what my main battle with the Yetzer Hara is?  When i finish learning a sugya, with all the relevant Gemaros, mefarshim, and halachic rulings, I feel an extreme “laziness” not to channel all my thoughts one more time to write it down in a clear and concise report.  This “laziness” is my Yetzer Hara! ~ The Chazon Ish zt”l as quoted in Torah Tavlin