When I went to film school about three years ago, the first two years you're required to make a series of short films. I started making films based on short poems. ↗
But above that, most mature adults can hold their attention on something for 45 minutes, whether they like it or not. But above that requires training. ↗
The present times require the vigor and the activity of the prime of life; but I feel the increasing infirmities of age to such a degree, that I am conscious I cannot serve you to advantage. ↗
Further, the dignity of the science itself seems to require that every possible means be explored for the solution of a problem so elegant and so celebrated. ↗