Pain is temporary, pride is forever. That’s the motto at Ironworks Athletic Club in Grass Valley. “It’s a metaphor that I live by,” Ironworks owner and operator Steve Matthews said. “You’ve heard of no pain, no gain. That’s too cliche-ish. “You come in. You work out. You push yourself or at least try your hardest to do what you can. There’s your pain … The pride is afterwards when you look at the results.” After several training sessions with Matthews, a national champion power lifter, I was definitely feeling the “pain.” Matthews, a 2007 national dead-lifting champion, took me through …