Acharya Prashant explains that human senses—sight, hearing, touch, and taste—are inherently limited to perceiving only material objects. He illustrates that a child remains essentially a machine until the age of twelve or fourteen, operating solely through these senses. Because the senses can only detect material phenomena like vibrations, collisions, and physical textures, a person who relies exclusively on them remains materialistic and mechanical. He argues that understanding cannot happen through the senses alone, even though common language suggests we 'make sense' of things to understand them.