The Last Kiss

There is a scene out of the movie The Last Kiss that I enjoy & put some ideas I have had into a different perspective and very tangible wording.

A father is confronting his daughter's partner about why he cheated on his daughter and also giving him some advice about love & being faithful. He says something to the effect of: Everyone says they love someone, saying you love someone means nothing. Your feelings only matter to you. It is what you do to those who you say you love that matter to everyone else.