How does Peter Abelard use imagery in The Letters of Abelard and Heloise?

Imagery:

"I preferred the weapons of dialectic to all the other teachings of philosophy, and armed with these I chose the conflicts of disputation instead of the trophies of war."

"Thus did Master Peter end his days. He who was known nearly all over the world for his unique mastery of knowledge and who won fame everywhere as a disciple of one who said 'Learn from me, for I am gentle and humble-hearted,' steadfast in his own gentleness and humility, thus passed over to him, as we must believe."