The wrong that another has done--let alone! Add not to it thine own. (Book ix., §20.)
How powerful is man! He is able to do all that God wishes him to do. He is able to accept all that God sends upon him. (Book xii., §11.)
A lamp sends forth its light until it is completely extinguished. Shall Truth and Justice and Equanimity suffer abatement in thee until all are extinguished in death? (Book xii., §15.)