Rabbi Nachman teaches,
You should be able to feel another person’s pain in your heart – all the more so when many people are suffering. It is possible to know another person’s pain and suffering yet still not feel them in your heart.
When many people are suffering, you should certainly feel their pain in your heart.
This is the meaning of the words: “Know this day and realize it in your heart .” (Deuteronomy 4:39) . You must bring the realization from your mind into your heart. Understand this well.
Sichot Haran #39
With permission taken over from: Daily Dose Of Rabbi Nachman