The Lord requires only this ...

Will the Lord be pleased with thousands of rams,
        with tens of thousands of rivers of oil?

     
Shall I give my firstborn for my offences,
        the fruit of my body for the sin of my soul?

     
He has told you, O mortal, what is good;
and what the Lord requires of you:  

     
        Only to do justice, 

        and to love tenderly,
        and to walk humbly with your God?

Micah 6.7-8