From “The Human Condition: A User’s Manual,” by Arnold Kunst
Now is the only now I've got, the only now that counts. After all, there is only so much I can learn from the strengths and weaknesses shown yesterday; there is only so much I can do by way of preparation for tomorrow. For there is no more benefit from yesterday's dinner than there is from tomorrow's oxygen. If I want the thing to happen, then I pick the thing up and go with it NOW.