Acharya Prashant explains that culture is a time-bound, man-made construct that must not be confused with the absolute truth. He argues that what people often defend as their ancient culture is frequently a collection of practices adopted from invaders or developed within the last few centuries. Using examples like clothing, food items like potatoes and tomatoes, and even social customs like women covering their heads, he demonstrates that many 'traditional' elements are relatively recent additions. He emphasizes that only the truth is eternal and sacred, whereas culture should be constantly refined and updated to serve the truth.