Angels are immortal beings, they can not die. Since they are spiritual beings, they are considered messengers of a divine being and expected to carry out that message. They are also guardians, warriors, judges, and guides. Angels are most commonly depicted in the form of a human with bird-like wings of white or gold, they may have a halo over the head or surrounding the entire body. They also appear in the form of fire, lightning, and clouds, have the power of invisibility and may appear or disappear suddenly, they are immortal and they can fly. While they may appear male or female, truly they are spirits, bodiless and sexless. They are divine beings blessed with great wisdom and the ability to pass judgement correctly, but they are not without fault.