For healthy adult people, the really big thing we can foresee are ways of intervening in the ageing process, either by slowing or reversing it.
I foresee the day when we shall read nothing but telegrams and prayers.
I foresee that man will resign himself each day to new abominations, and soon that only bandits and soldiers will be left.
We must not, in trying to think about how we can make a big difference, ignore the small daily differences we can make which, over time, add up to big differences that we often cannot foresee.
The future will be determined in part by happenings that it is impossible to foresee; it will also be influenced by trends that are now existent and observable.