This entire text is in the form of a blessing. Actually, in Greek, verses 3-14 comprise one long sentence. Outside of the New Testament, there are no other examples of an introductory blessing in a letter (2 Corinthians 1:3,4 is the first New Testament example). The eulogy feature of the epistolary setting is a uniquely Christian contribution.
These lines have been variously called "the most monstrous sentence conglomeration É that I have encountered in Greek" (E. Norden) and "the marvelous spiral of Ephesians 1:3-14 is probably without rival in Greek literature" (Danker). This diversity of interpretation and evaluation is somehow appropriate to an ecumenical letter which is addressed to the whole oikoumene the whole inhabited earth.
This portion of Ephesians has been called "the doxology …