e.g. Parenting.

In store new parent is pushing a cart while chld crawls along on the floor, barking at various shoppers.

The ones sniggering and pointing while saying things like "MY child will never do that!", are non-parents (the unexperienced)

The ones smiling in sympathy, are the parents who have had children, and know the new parent may be embarassed, but has no need to be. Many of these parents have had kids do many creative things that cause parental hand to head movements, as well as head to wall movements.

Walk on in pride, knowing you will one day easily lend a hand to one who has less experience than yourself, who you will understand better than they will know at the time.

Enjoy the journey, because at the end you will see, the journey is all there was.