The human brain could perceive the surrounding world and collect information through the senses. This information included sight, hearing, touch, smell, taste, and so on. When we experience something, our brain will integrate this sensory information into our memories of the past. Because our brains constantly reconstruct our sensory information over time, we may feel as if we have experienced certain things before. This feeling could be due to a deviation in our memory or a misinterpretation of the world around us. In either case, this feeling can help us better understand our past experiences and help us better deal with future challenges.