Things that were, are no more. Things that are, will again be no more. Grief cannot restore them. One should not, therefore, succumb to grief.
भूत्वा च न भवत्येतदभूत्वा च भविष्यति। शोके न ह्यस्ति सामर्थ्यं शोकं कुर्यात् कथंचन॥