The writer speaks of his heart as if it were a container that overflows with liquid. The word "heart" represents his emotions, which are excited by the song that he sings. AT: "My emotions are excited about a good subject" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-metonymy]])
The writer speaks of his tongue as if it were a pen. He speaks words as skillfully as an experienced writer writes words. AT: "my tongue is like the pen of person who writes well" or "I speak words as skillfully as an experienced writer can write words" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This phrase is an exaggeration that emphasizes that the king is better looking than anyone else. The phrase "children of mankind" is an idiom and refers to all humans. AT: "You are more handsome than any other man" (See: [[rc://en/ta/man/translate/figs-hyperbole]] and [[rc://en/ta/man/translate/figs-idiom]])
The writer speaks of grace as if it were oil that someone has used to anoint the king's lips. The word "lips" refers to the king's speech. The phrase means that the king speaks eloquently. AT: "it is as if someone has anointed your lips with oil" or "you speak eloquently" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-metonymy]])