I had an hour to go hiking this morning. I used my iPhone to time how long it took to get to a number of "landmarks" along the way so I can get a better idea of how far I can go with the time I have available. I noticed that I don’t get nearly as tired as I did the first day. I thought of a quote from Heber J. Grant: That which we persist in doing becomes easier to do, not that the nature of the thing has changed, but our power...