Acharya Prashant explains that the human mind's tendency to wander away from the present moment is not an innate condition but an acquired disease. He points out that children are born simple and innocent, living fully in the present without concern for the past, the future, or the opinions of others. A child does not carry the burden of memories or grudges, nor do they worry about what will happen years later. They are self-sufficient and happy because their focus is entirely on the immediate experience.