I was told many years ago by my grandmother to stury hard when young, really hard, and study everything because when older, over 50, the mind seems to be unable to absorb as well or hold it for a long while. I listened to her and did as she asked but didn't think it was necessarily so. Well I am here to attest to the fact that grandma was absolutely correct. I can feel it happening to me every day. Thank God I did gather info on so many things and they are apparently in my brain because the learning now is so much slower and harder for me.