Matthew 6:22-24 (22) The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light. (23) 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! (24) 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.

I Corinthians 16:14-18 (14) Let all your things be done with charity.  (15)  I beseech you, brethren, (ye know the house of Stephanas, that it is the firstfruits of Achaia, and that they have addicted themselves to the ministry of the saints,)  (16)  That ye submit yourselves unto such, and to every one that helpeth with us, and laboureth.  (17)  I am glad of the coming of Stephanas and Fortunatus and Achaicus: for that which was lacking on your part they have supplied.  (18)  For they have refreshed my spirit and yours: therefore acknowledge ye them that are such.