Detachment doesn't mean you don't let the experience penetrate you. On the contrary, you let it penetrate you fully. That's how you are able to leave it.
Detachment is often misunderstood as a lack of emotional engagement, but true detachment involves embracing experiences fully. By allowing these experiences to impact us deeply, we can process and understand them better. This understanding enables us to eventually release our attachment to the situation.
The idea presented in "Tuesdays with Morrie" emphasizes that fully experiencing emotions is crucial for personal growth. Instead of avoiding feelings, one should accept and engage with them to achieve a sense of freedom and clarity, ultimately allowing us to move forward with our lives more effectively.