What message should I engrave on my dad’s urn?

I recently saw a picture of an engraved urn with a special message to a father who had passed. I’ve had my dad’s cremation urn on my mantelpiece for many years, but I never thought to have it engraved – but I think its a great idea! It will be a unique way to personalize the urn and celebrate his memory. My only problem is that I don’t know what the message should say. This is why I’d like to ask for any ideas on what I can get engraved on his urn. I’m looking forward to your suggestions!