Experience with God = Change

Blogger Daniel Chew has a great devotional piece on Isaiah Chapter 6 at Daniel's Place - (Reformata et semper reformanda): Weekly Meditations: Is. 6 (part 3) Excerpt below:

Isaiah after having seen the Living God and having his sin symbolically forgiven was then re-commissioned for service unto God. It must here be noted that an experience with God aways results in transformation of the person and especially for service unto God as in the case of Isaiah. Those who have had an experience with God cannot remain the same in their sins and apathy towards the needs of the world. Whosoever claims to have experienced God yet remain the same in their sin and apathy is a liar. Or as the Apostle John wrote, "Whoever says “I know him [Christ]” but does not keep his commandments is a liar, and the truth is not in him" (1 Jn. 2:4)