Say them. Feel the way the syllables form and curl around your tongue. Watch them turn cartwheels and somersaults across the arena of your imagination. Smell them. Taste them. Delight in the pure joy that comes from a metaphor well-used or a comment well-directed.
Dare stop the tears that well in your eyes when Steinbeck's characters hold their heads high in The Grapes of Wrath. Try suppressing that giggle as Bertie Wooster bumbles again, and sniff in contempt as Jeeves saves the day again. Gaze agape at the fount of fables that is Neil Gaiman.
Why stop at reading? Stand tall when you deliver that impeccably worded one-liner with a smirk on your lips. Cringe when someone uses the same three adjectives all the time to describe completely unrelated things. Distill some of what you read (nay, drink, imbibe) into something of your own.
Try and make them stand on their own feet. OK. Maybe you are ambitious. Try and make them do their own stunts.
Use them. Respect them as they are your best friends. And your worst enemies.