You are never too old to set another goal or dream a new dream. (C. S. Lewis, late British writer)
When is too old too old? There may be a time, of course, when you can’t physically do some of the things you used to do. Play football or do calculus in your head (could you ever do that?). But, so long as you have some mental acuity, you can continue to learn and share your wisdom and experiences with others. Don’t let the number of years limit your ability to grow.
Don’t long for “the good old days.” This is not wise. . . . When people live to be very old, let them rejoice in every day of life. (Ecclesiastes 7:10; 11:8).