Things that are made of iron, like a knife or a sword, can sharpen each other. You can take two knives made of iron, rub them together, and they’ll sharpen each other without the other one dulling out.
That should be true with our friendships. We should hang around people who have the same values as us. That way, we can continually build each other up.
Those kinds of friendships will help you and your friends grow each other, challenge each other, encourage each other, and strengthen each other to be who God intended you to be.
So go and be iron to one another and become who God made you to be.