肇論新疏 3.334

3.334

《放光》二十四云：「佛言：『適無所為，故行般若波羅蜜』」等。無為，寂也。無所不為，動也。寂不妨動故。

The Pañcaviṃśatisāhasrikā (Light-Emitting Sūtra), fascicle twenty-four, says: “The Buddha said: ‘Precisely because there is nothing to be done, one practices the prajñāpāramitā,’” and so forth. Doing nothing is quiescence. There being nothing not done is movement. This is because quiescence does not obstruct movement.