Whatever you do in this life, it's not legendary unless your friends are there to see it.

Yes this quote suits Barney. BUT. I think it's one of the worst life lessons in the show. Of course, having one or a few best friends is important and sharing moments and memories with people you love is important. That doesn't mean you can have the best time with just yourself, (or random people). Things can and should also be able to be legendary in times where you have no one around, need time for yourself or have a phase with absence of true friendships. I have a few very legendary memories where I looked around, and I was all alone.