It’s a classic bit of advice, but it’s true concerning opinions you hold and conflicts throughout your life: You must never remain neutral.
Some people are foolish enough to think they can play both sides of the fence, but you’re not as clever as you think and they don’t respect you as much as you think they do.
Never remain neutral. You must take a side. If you don’t pick a side, the winner will never respect you (and probably take advantage of your cowardice) and the loser will despise you.