We have some foresight. 

We can think about and anticipate some problems and address them.

We can’t, however, anticipate everything. 

Trying to do the latter is easily one of the top reasons why a) we take too long to try something or b) worse — we never try at all. 

When you try to know everything, you will think your way out of doing anything. 

When you recognize that you can’t know everything, you realize that your only option is to do something.