According to cicero, what should Great thinker do?

According to Cicero, great thinkers should use eloquence to spread knowledge. Eloquence is understood as fluent, forcible, elegant or persuasive speaking. It constitutes primarily the power of expressing strong emotions in striking and appropriate language, seeking to produce conviction or persuasion.

Hope it helps:) ps have a great day! (taken from Google)

Thick as foliage of the waving wood; the figurative language that is used here’s referring to a battle. these are two mountains that we facing opposite of each other, and they have better armies.