Stoic and Buddhist Philosophies Stress Productivity Now

Your Productive Life is Only as Long as You Retain Your Mental Faculties > Similarity > Life is Short, Train Hard Now
We must be productive now while we have the faculties to do so.

 Buddhist and Stoic Perspectives on Death

Your Productive Life is Only as Long as You Retain Your Mental Faculties > Comparison > Meditation Strengthens Focus
Stoicism observes you are only productive for as long as you maintain your mental faculties. Buddhism observes that you must train your mental faculties before they deteriorate before death so that you may remain cognitively vigilant.