Here is a great definition of worship I recently came across whilst reading John Piper’s Let the Nations Be Glad. Piper says (at 231):
Worship is not a gathering. It is not essentially a song service or sitting under preaching. Worship is not essentially any form of outward act. Worship is essentially an inner stirring of the heart to treasure God above all the treasures of the world –
a valuing of God above all else that is valuable
a loving of God above all else that is lovely
a savouring of God above all else that is sweet
an admiring of God above all else that is admirable
a fearing of God above all else that is fearful
a respecting of God above all else that is respectable
a prizing of God above all else that is precious.
In other words, worship is right affections in the heart toward God, rooted in right thoughts in the head about God, becoming visible in right actions of the body reflecting God.
Wow, no wonder Paul says in Romans 11:36 that “from Him and through Him and to Him are all things!”
The Worship Revolution 