If Brutus is the subject of loyalty, you may wish to look at how Marc Antony eulogizes Brutus in the final act after Brutus is slain and the triumvirate prevails in the battle at Philippi. Most importantly, Antony praises Brutus as "the noblest of them all":
This was the noblest Roman of them all.
All the conspirators, save only he,
Did that they did in envy of great Caesar;
He only, in a general honest thought
And common good to all, made one of them.
His life was gentle, and the elements
So mix'd in him that Nature might stand up
And say to all the world, “This was a man!” (5.5.74-81)
Again, a conclusion summarizes what has been proven in the body of the essay. So, if you have written about Brutus and his integrity and high principles, this passage may prove useful to you.