For the Second Commandment requires that even the one true Triune God alone is to be worshipped — only in a Spirit-ual way. Viz., He is to be worshipped only in Spirit, and not even reverently to be represented in an imag-inary way through images made purportedly even of any of the three Persons of the Triune God. For "God is Spirit, and they that worship Him, must worship Him in Spirit and in truth" alone! John 4:24 cf. First John 5:20-21.
This means no Romish statues imag-inarily imag-ing the so-called "Holy Family." It further means no allegedly-transubstantiationistic Masses etc. And it also certainly means no Eastern-"Orthodox" iconic pictures — or even Quasi-"Protestant" stained-glass church windows or children’s picture-books with a long-haired hippie imag-inarily (mis)representing Jesus.