If you have seen a mouse and a spider in your dream: Knowing this, you can review your certain plans, methods or teammates, Sometimes you may experience uncertainty due to situations that you cannot see. To see a mouse and a spider in your dream refers to a sense of compassion, being an ambitious person, success and power, meaning of life and being a magnanimous person. Chasing mice and spiders in a dream means that bad luck will haunt you and life will gain meaning.