AOF.FE.080307.EDR.JPG  Iconographer Tom Clark re-touches the halo around his 22-foot portrait of Christ inside the dome of St. Nektarios Greek Orthodox Church in Charlotte on Friday, August 3, 2007.  &quot;This might be the only time some people see the light of Christ,&quot; said Clark, who tries to guide souls, not as a priest, but as a painter.  &quot;My hands, this paint, these visions ... they are all gifts from God,&quot; said Clark, who explains he is making visible an invisible world he sees full of angels, saints, and Christ.  &quot;Going between these two worlds ... what a thrill!&quot;  Clark, originally from Chicago, lives near Athens, Greece, with his wife and five sons.  He expects to complete this, the largest commission of his 25-year career, by October.  Staff photo by Ted Richardson/News &amp; Observer...