The one and only way
to relieve your heavy burden
of past grave transgressions
is to make great amends now.
If those transgressions made are so great,
that it cost (physical and/or spiritual) lives,
the whole of this remaining life (at least)
must be for making remedial actions.
If many lives were destroyed,
many more lives must be saved,
with redeeming of others
for redeeming oneself too.
This life is too short
for making the same mistakes twice,
for not undoing them best you can,
or you will be making an even greater mistake.