Acharya Prashant explains that words often have two distinct meanings based on the level of consciousness: one rooted in ignorance and the other in understanding. Using the word 'mother' as an example, he distinguishes between the physical mother who gives birth to a body and the spiritual mother who provides liberation and understanding. He notes that while physical birth is a common biological process shared with animals, the 'second birth' or becoming 'twice-born' is a significant spiritual transformation where one understands the nature of the mind, body, and world.