drive home

Make clearly understood, make a point, as in The network news programs drive home the fact that violence is part of urban life. This expression uses the verb drive in the sense of "force by a blow or thrust" (as in driving a nail). Samuel Hieron used it in Works (1607): "That I may ... drive home the nail of this exhortation even to the head."

The verb has 2 meanings:

Meaning #1: carry out or perform
  Synonym: deliver

Meaning #2: make clear by special emphasis and try to convince somebody of something
  Synonyms: ram home, press home