“The multitude of your sacrifices—
what are they to me?” says the Lord.
“I have more than enough of burnt offerings,
of rams and the fat of fattened animals;
I have no pleasure
in the blood of bulls and lambs and goats. (Isaiah 1:11 NIV)
Why would God say that He has “no pleasure in the blood of bulls and lambs and goats,” when the Torah is filled with His commands to offer the blood of bulls and lambs to Him? The answer is that he does not take pleasure in sacrifice when it does not come from the heart. The law says: “You shall love the Lord your God with all your heart and with all your soul and with all your might.” (Deuteronomy 6:5). It is not good enough to simply follow the laws on the outside, because you must also follow them them in you heart. Otherwise your outside obedience becomes fake, and makes God angry.