Unlike the first two Holy Temples, the Third Holy Temple, not only will not have a ban on having metal, it will be constructed mainly of metal – for metal / iron, a strong substance, represents the current exile, in which our passions for foolishness, sexual predilections, honor and the like, overcome our soul; but the Third-Temple is the reverse, when our passion for God, goodness and kindness, overpowers; hence, it represents the iron-will for what’s good and true – the only force that can overcome the “iron” stupidity of foolish predilections