Whoever you may be, there is an enemy who is a devoted threat to you, who wishes for you eternal torment, having dedicated his whole existence to that end. That enemy is Satan. That is, Satan whom Allah cursed and expelled from His presence. He is your greatest foe. Nor is he a mere myth or legend, but a real being.
He has been in existence throughout human history. Millions who lived and died have succumbed to his wiles and been thrown into the flames, and continue to do so. He makes no distinctions among his victims: young or old, male or female, a head of state or beggar... He is against all human beings.