How does fire look to you? Fire has a great luster or brilliance and radiance.
Can you touch fire or keep your hand close to it for long?
What happens when you put any object in fire? The fire consumes or burns all things at once when placed in the fire.
Does the fire become impure or dirty because all sorts of objects are placed in it? No, the fire remains always holy, pure and brilliant.
Fire is used to burn incense and purify the atmosphere. Medicinal herbs are burned during fire worship (homa) to purify the surroundings.
Fire is used to worship in a subtle form as it purifies the atmosphere. Fire burns away past and future sins of people by accepting both the offerings placed in it by devotees and the mantras chanted during the offerings.