# Do you think that I could not call ... angels?

Alternate translation: "Surely you know that I could call ... angels." 

# Do you think

Here "you" is singular and refers to the person with the sword.

# my Father

This is an important title for God that describes the relationship between God and Jesus. 

# more than twelve legions of angels

Alternate translation: "more than 12 really large groups of angels"