Tis easy to see hard to foresee is one of Benjarmin Franklin's famous aphorism What do you suppose he meant by this particular aphorism?

Answer 1

Simply:

A person cannot predict the future without looking into his past.

In depth:

"t'is easy to see, hard to foresee" it's a frase that can have multiple meanings but probably meant that it's easy to see what's happening (cience evolution for example) but much more dificult is to predict how, who and when an action will be made (when,who and how a discovery is made )

a complete example could be: it's easy to see if a rober in a bank is willing to shoot a hostage to get out, much more difficult is to predict when and who