how spread the thought 思考の広がり方

If we throw a piece of stone in a tank or a pool of water, it will produce a succession of concentric waves travelling all around from the affected place. The light of a candle will similarly give rise to waves of ethereal vibration travelling in all directions from the candle.

Swami Sivananda ---Thought Power p17

桶や池に石の欠片を投げると波紋が生じるように、キャンドルの灯からは全方位に向けてエーテル状の波動が漂います。