Chess paradox !!

I had a game today. The game, actually, was not really my type, however, it led me to have some questions about chess. The questions might be verry common, however, I could not find a decent anwser, therefore Im posting here

How can I win if my opponent can see what I could do?

While playing I always think why Im moving a piece trying to do an attack 4 moves ahead if he should see what Im going to come up, and I dont really know how to solve this. This causes me to be verry undecisive before moving a piece. Is this normal?

If both players knew the same amount and could see the same distance ahead, the games would usually be draws. A player wins exactly because he either knows more or can see farther ahead. No mystery or paradox there.

(p. 370)
   Afterwards, Geller tried to offer my opponent some sympathy.
I overheard a dismayed Kholmov telling him that I had "seen
everything!" This game was particularly sweet because it was
my first win against a Russian in almost a dozen tries (since game
52)--and my first with Black since 1962 (Korchnoi at Curacao).

Fischer, Bobby. 1969. My 60 Memorable Games. New York: Simon and Schuster.

This isnt a chess paradox, that is the game of chess lol. You need a deeper understanding of chess, its not all about being able to see moves ahead ( anyone can do that) it about making the right moves. In every position in chess there are strengths and weaknesses, being able to attack your opponents weaknesses and defend your own is the key to success.