Money.

Romans 12:4-8

4 For as in one body we have many members, and the members do not all have the same function, 5 so we, though many, are one body in Christ, and individually members one of another. 6 Having gifts that differ according to the grace given to us, let us use them: if prophecy, in proportion to our faith; 7 if service, in our serving; the one who teaches, in his teaching; 8 the one who exhorts, in his exhortation; the one who contributes, in generosity; the one who leads, with zeal; the one who does acts of mercy, with cheerfulness.

"... so we though many, are one body in Christ, and individually members one of of another..." 

Money.