"worship God acceptably" - Hebrews 12:28

It is amazing how much one word can change what you take from a verse.  If instead, Hebrews 12:28 read, "worship God with reverence and awe" it would certainly make a point worth noting.  God's mercy and love deserve reverence and his power inspires awe, as such the verse makes total sense.  However, when the word "acceptably" is added to the mix (same in NIV, NKJV, the NASB has "an acceptable service"), an added requirement is spelled out for the people of God.  If there is a way to worship God "acceptably" then there must be an unacceptable way to worship God.

Do you mean that I could direct my love and devotion to the right place (that is God) and still be short of what God wants from me?  That's exactly what the verse is saying.  We don't have to go far in Scripture to find examples of people who failed in their worship of God because they did it in the wrong way.  Cain springs to mind, whose sacrifice was inferior to that of his brother Abel.  King Saul learned the hard way that to offer a sacrifice to God that was unauthorized would cost him the right to rule Israel.  Throughout the prophets God warns his people that their hollow sacrifices would mean nothing without obedience.  As Jesus teaches the people he repeatedly demolishes the Pharisees for having the letter of the Law but being far from the Spirit of the Law; they may have perfected the form of worship, but are nowhere near the heart.

Is an acceptable form of worship the serious approach of many Catholics and Orthodox who treat the Mass with great solemnity?  Or does God prefer the utter exubrance of the Pentecostals who celebrate like no other?  The answer is not to be found in the form of worship (each end of the spectrum has something to offer, and many places in between as well), but the heart of the matter.  If we appreciate the seriousness of what Jesus has done for us and find the joy that being forgiven should bring, we're on the right path.  The question is not so much how you worship, as it is why.  If you feel connected to God through Latin chants, go right ahead.  If shouting out during the praise band's modern anthems brings you closer to God, knock yourself out.  Why do we worship?  To bring glory and praise to God.  In the end, it is your heart that determines if your worship is "acceptable" in the sight of God.