We know BA GUA theory belong to philosophy.In my opinion, "one movement -- one stillness" is just similar with dialectical methodology. That should mean "stillness is in the midst of motion wihle movement in the midst of stillness".In chinese,it should be “静中有动，动中有静”or“动静结合”。 PS： In BA GUA theory,stillness could be indicated by YIN “阴”,movement could be indicated by YANG“阳”。“阴”and “阳”is the essence of BU GUA. PS：May i know whether you study Chinese GongFu of Changes(ZhouYi theory)

‘one movement -- one stillness’ 一动--一静 one------yi 一（ two "one" are all the second tone) movement------dong 动 (the fourth tone) stillness------jing 静 (the fourth tone) 动------改变原来的位置或状态 静------停止的 动和静是相对的。

one - movement 一 動 yi (flat tone but you need to pronounce it with the rising tone, same below) dong (falling) one - stillness 一 靜 yi jing (falling) movement 動 dong (f) stillness 靜 jing (f) one 一 yi