"WALK IN THE SPIRIT" DEFINED
For example, the students of Aristotle were known as the Peripatetics because of their habit of following the philosopher around from place to place as he dispensed his teachings. In Paul’s vocabulary, to "walk in the Spirit" or be "led by the Spirit" means to go where the Spirit is going, to listen to his voice, to discern his will, to follow his guidance
(Source: George, Timothy: Galatians. electronic ed. Nashville : Broadman & Holman Publishers, 2001, c1994 (Logos Library System; The New American Commentary 30), S. 386. From a sermon by Matthew Kratz, "Spiritual Warfare: The Flesh vs. The Spirit" 2/15/2009)