Do you know a good Father's Day quote to engrave on a pocket watch?

Quote must be short since it will be engraved on a small pocket watch. I want it to be an heirloom ped from my husband to our son one day and on through generations. I was thinking maybe incorporate the word "Timeless" or "watch" or something about time since it is a watch and would also like it to be about Father's and sons or about being a Father since it is a Father's day gift..... any ideas? I have come up with few, but just looking for that perfect quote. Thanks!