Here Elihu refers to himself by his "heart" as he speaks of being upright. Alternate translation: "I will speak with uprightness" or "I will speak with complete honesty" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
Here Elihu refers to himself by his "lips" to emphasize his speech. Alternate translation: "I will speak sincerely to you the things I know" (See: [[rc://en/ta/man/translate/figs-synecdoche]])