have a mind as sharp as a steel trap
Fig. to be very intelligent. She's a smart kid. Has a mind as sharp as a steel trap. They say the professor has a mind as sharp as a steel trap, but then why can't he figure out which bus to take in the morning?
nerves of steel
Fig. very steady nerves; great patience and courage. I was scared to death, but Fred, who has nerves of steel, faced the thugs bravely.
steel oneself for someone or something
to prepare oneself for someone or something difficult or unpleasant; to get ready to face someone or something. Aunt Helen is coming for a visit. We should steel ourselves for her. I think something is going wrong. We had better steel ourselves for a shock.
steel someone against someone or something
to fortify someone against someone or something; to prepare someone to endure someone or something. I tried to steel Liz against Carl, who was bringing her some very bad news. We steeled her against the bad news.
*true as steel
very loyal and dependable. (*Also: as ~.) Through all my troubles, my husband has been as true as steel. Pedro was a staunch friend, true as steel.