Objective Of Moral Philosophy
Please specify the exact Meezan passage or video time stamp that you’re referring to in your question so that the context of your question can be understood properly and responded appropriately.
What he’s referring to there is not material happiness that generally comes from fame and fortune but is temporary in nature. The kind of happiness, perfection, and the sense of fulfilled duty one achieves by being moral all the while aiming for purification (tazkiya) is in the form of contentment which is much more durable. It is in fact our innate desire to be morally just, but when we fulfill that desire with a proper goal of tazkiya in mind then not only that it’s more satisfying but nothing can ever take it away.