A draw can be obtained not ...

A draw can be obtained not only by repeating moves, but also by one weak move.
 Savielly Tartakower

Quotes from the same author

The ability to create and to control the tension of battle is perhaps the principal attainment of the great player.
 Savielly Tartakower
Like the alchemist of old, for ever searching for the philosopher's stone, the analyst to-day never stops looking for stronger moves to prevent the defender from establishing equality.
 Savielly Tartakower