Show me three lines of the opening theory moves and I will prove to you that two of them are incorrect.

To find the right plan is just as hard as looking for its sound justification.

I have added these principles to the law: get the Knights into action before both Bishops are developed

If Steinitz continually took pains to discover combinations, the success or failure of his diligent search could not be explained by him as due to chance. Hence, he concluded that some characteristic, a quality of the given position, must exist that would indicate the success or the failure of the search before it was actually undertaken.

I believe in magic ... There is magic in the creative faculty such as great poets and philosophers conspicuously possess, and equally in the creative chessmaster.

To refer to the oft mooted question, "Which piece is stronger, the Bishop or the Knight?" it is clear that the value of the Bishop undergoes greater changes than that of the Knight.

By what right does White, in an absolutely even position, such as after move one, when both sides have advanced 1. e4, sacrifice a pawn, whose recapture is quite uncertain, and open up his kingside to attack? And then follow up this policy by leaving the check of the black queen open? None whatever!