We can learn a lot from our grandparents. They've lived a lot of years, and they know a thing or two about life and love. They're infinitely wiser than we are, and we should take their advice whenever possible. Imagine how excited Reddit user YellyG was when he found a handwritten note from his grandfather attached to the RSVP to his wedding. Yes! Get ready for some beautiful insight on the wonderful journey that is marriage. Here's the note: