Flower of regret
We tend to remember things that are not ours and things that leave us constantly. It is fortunate that at least from the remaining opportunity to do this kind of training, to times that can be missed.
Footnote: The flower of regret is bitter and birds and butterflies do not approach it. This plant withers and disappears in the spring, longing to see these creatures, and in the fall, it grows green again with the hope of seeing the birds, and because they do not come to this plant this time, it grieves and dies. (Based on an Iranian Myth)