Original: 413 , finished 426 ) On the Trinity ( De trinitate , 400-416 ) Enchiridion ( Enchiridion ad Laurentium , seu de fide , spe et caritate ) Retractions ( Retractationes ) : At the end of his life ( ca .
Simplified: 413 , finished 426 On the Trinity , 400-416 Enchiridion Retractions : At the end of his life ( ca .