The chameleon takes the color of his background and environment - tree or bush.
Many Christians are chameleon-like in the facility with which they can take on the color of the world about them; and, just as it is difficult to distinguish the chameleon from the background, the color of which he has taken, so it is very difficult to distinguish many Christians from the background of the world in which they live.
Rom 12:2 (GNB): “Do not conform yourselves to the standards of this world, but let God transform you inwardly by a complete change of your mind…”
“We had long known the Lord without realizing that meekness and lowliness of heart should be the distinguishing feature of the disciple. - Andrew Murray.
“… Your presence with us will distinguish us from any other people on earth.” – Moses. (Exodus 33:16 GNB)