Matthew 6:22-24 (New International Version)
New International Version (NIV)
Copyright © 1973, 1978, 1984 by International Bible Society
22"The eye is the lamp of the body. If your eyes are good, your whole body will be full of light. 23But if your eyes are bad, your whole body will be full of darkness. If then the light within you is darkness, how great is that darkness!
24"No one can serve two masters. Either he will hate the one and love the other, or he will be devoted to the one and despise the other. You cannot serve both God and Money.
Not quite the one I was talking about, but luke has something similar
Luke 11:33-38 (New International Version)
New International Version (NIV)
Copyright © 1973, 1978, 1984 by International Bible Society
The Lamp of the Body
33"No one lights a lamp and puts it in a place where it will be hidden, or under a bowl. Instead he puts it on its stand, so that those who come in may see the light. 34Your eye is the lamp of your body. When your eyes are good, your whole body also is full of light. But when they are bad, your body also is full of darkness. 35See to it, then, that the light within you is not darkness. 36Therefore, if your whole body is full of light, and no part of it dark, it will be completely lighted, as when the light of a lamp shines on you."
And there are many other verses in the bible talking about beings of light. The first verse would seem to imply that if we are divided, then we can't be beings of light. I'll see if I can find the verse David mentioned.
Ok, David was reffering to what jesus said to the sermon on the mount.
http://www.mountainman.com.au/jc_mount.html
The light of the body is the eye:
if therefore thine eye be single,
thy whole body shall be full of light. [22]
But if thine eye be evil,
thy whole body shall be full of darkness.
If therefore the light that is in thee be darkness,
how great is that darkness! [23]
No man can serve two masters:
for either he will hate the one, and love the other;
or else he will hold to the one, and despise the other.
Ye cannot serve God and mammon. [24]