The great thing about an opening like the King's Indian Attack as White is that it is more about piece-placement and positional motifs that it is about specific book lines. Steve Stoyko, Lecture - Kenilworth Chess Club
The Open Variation (of the Ruy Lopez) has a large number of variations to choose from. Both sides have options on so many moves that very little has been definitively worked out. This is an ideal system for the average player, both from a practical and educational point of view. John Watson, Mastering The Chess Openings - Volume 1
Those who try to excel in chess, soccer or their work will always be targets for humour and jealousy. Just ignore people who cannot accept that you are trying to achieve something. Jacob Aagaard, Excelling At Chess
The first steps that some grandmasters take, after a queen trade, are literally steps - they get up and walk away from the board, even if it means letting their clocks run. The reason is that they want to clear their minds and put middlegame thoughts behind them. Andrew Soltis, Turning Advantage Into Victory In Chess
The biggest advantage in sticking to respectable main lines is that you can rest assured that the opening you are playing is fundamentally sound, and is not likely ever to be refuted. Steve Giddins, How To Build Your Chess Opening Repertoire
In order to handle pawns well, it is important to learn not to handle them too much. Preparing is better than repairing. Savielly Tartakower, A Breviary Of Chess