Sun Tzu Quote
When he utilizes combined energy, his fighting men become as it were like unto rolling logs or stones. For it is the nature of a log or stone to remain motionless on level ground, and to move when on a slope; if four-cornered, to come to a standstill, but if round-shaped to go rolling down.
Sun Tzu's The Art of War: Bilingual Edition Complete Chinese and English Text (ed. Tuttle Publishing, 2012) - ISBN: 9781462905126