Whenever Imam Hasan al-Mujtaba (a) would mention the name of Allah or would think about the Day of Judgement and the realm of the hereafter, his state would significantly change. This is what would happen to the Imam, despite his position of virtue and infallibility. So then, how must we feel, considering all of our impurities and sins? Thus, it is good that human beings ponder upon these matters daily.
Ayatullah Makarim Shirazi