“Iron sharpens iron, and one man sharpens another.”
The proverb comes from the smith who knows: only another piece of iron can sharpen a blade — nothing softer does the job.
Sharpening requires contact, pressure, and sparks — friendship that forms character is rarely comfortable the whole time; sometimes it scrapes before it sharpens.
"One man sharpens another" — both sides give and receive; no one is only the sharpener or only the sharpened in a healthy friendship.
Not every friendship sharpens — some just wear you down. The proverb implies wisdom in choosing who has enough substance to actually shape you.
A sharpened blade is fit for use — God uses friendships like this to prepare you not just to grow, but to be useful wherever he calls you.
Act: Reach out today to someone who regularly challenges you with truth, and thank them specifically for one way they've already helped you grow.