The Tao is near and yet people seek it far away

Those whose vital spirit is scattered outwardly and whose intellectual ruminations ramble inwardly cannot govern their bodies. When what the spirit employs is distant, then what it loses is nearby.

So know the world without going out the door, know the weather without looking out the window; the further out it goes, the less knowledge is. This means that when pure sincerity emerges from within, spiritual energy moves in heaven.

Reference: Title quote from Mencius, Lyrics Wen-Tzu: Understanding the Mysteries 20 p. 26 translated by Thomas Cleary