Regret

Do you know why negative feelings are so great in our hearts?

How many stories of happiness in the past, or how many people surround and care today, if our eyes are blinded by sorrow and we cannot see anything? Because our eyes will be filled with tears and our hearts will be filled with regret.

Even the moments of happiness in front of us can make us look back on the lost time and the heartfelt reverence. We will imagine ourselves wanting to go back and fix that situation again and again. Even though you yourself know very well that it will never be possible.

And that's because our heart was filled with "regret".