Christian vector calligraphy lettering text Soli Deo Gloria. One of five points of the foundation of Protestant theology. Sola Scriptura, Sola Gratia, Solus Christus, Sola Fide, Soli Deo Gloria.. Christian vector calligraphy lettering text Soli Deo Gloria. One of five points of the foundation of Protestant theology. Sola Scriptura, Sola Gratia, Solus Christus, Sola Fide, Soli Deo Gloria