Powerful
In Revelation 6:15, the powerful - also sometimes translated as strong, mighty, or potent - refer to the truths which make up our external minds. They are paired with the commanders of thousands, which are the related good external or natural loves that we have. Note, too, that they are listed after the kings, the great ones, and the rich, which here stand for more interior goods and truths.
(Referências: Apocalypse Explained 408)
Ezekiel 16:60-62
60
Nevertheless I will remember my covenant with you in the days of your youth, and I will establish to you an everlasting covenant.
61
Then you shall remember your ways, and be ashamed, when you shall receive your sisters, your elder [sisters] and your younger; and I will give them to you for daughters, but not by your covenant.
62
I will establish my covenant with you; and you shall know that I am Yahweh;
