good command of, full use of

to make excellent use of, to have a good command of

excellent, outstanding, superior

be good at (a thing); be superior to (a person)

spur a horse on / expel / drive away

ability; capability; capacity; faculty

messenger

use

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend