The threat is stronger than its execution
Famous chess proverb. I never really understood its meaning until I started playing Go.
tderz: ... by Aron Nimzowitsch, I guess.
Deep full information games also have more below the surface (the iceberg 89%, Go 99%).
Actually it was Seigbert Tarrasch.
I thought it was Emmanuel Lasker.
During a quick search in the net I have seen it attributed to Aron Nimzowitsch, Siegbert Tarrasch or Savielly Tartakower. The last one seems unlikely, being rather aphorist and kind of a jester (his grandmaster strength nowithstanding) than profound theoretician.