People do not remain equally steadfast every day. When mistakes occur, sincere repentance, restoration of others' rights, and practical reform remain important. The report concerns both hope for the future and responsibility in the present.
Example 1: One previous success does not remove the need for continued work.
Example 2: Someone who has made a serious mistake can still seek to correct it rather than despair.
خَاتِمَةٌ is singular; خَوَاتِيم is a plural form. The word points to a conclusion, so attention to the continuing course of action is essential.