He 'waxed eloquent' [=he said many things] on/about the pleasures of gardening.
His success serves as an 'eloquent' reminder of the value of hard work.
She spoke 'eloquently' about the need for better schools.
(..) ...and that your choices today reflect their bravery. Three hundred. We must send them. Moving... ...eloquent, passionate. But it doesn't change the fact that your husband has brought war upon us. You are wrong. Xerxes brought it forth... ...and before that, (..)2006 300