Acharya Prashant addresses the fear of losing something when encountering the truth. He explains that if there is a fear of loss, it is proof that the thing being held onto is external and not truly yours. What is genuinely yours can never be taken away; therefore, fear is a sign of unnecessary identification with external possessions, relationships, or ideas. He emphasizes that one should not take external things too seriously, as they are temporary and their departure is actually a relief from a burden. True security comes from realizing that your existence and worth are independent of what the world gives or takes away.