What is worship?

Worship of the living and true God is essentially an engagement with him on the terms that he proposes and in the way that he alone makes possible.
-David Peterson

To worship God ‘in spirit and in truth’ is first and foremost a way of saying that we must worship God by means of Christ. In him the reality has dawned and the shadows are being swept away (Hebrews 8:13). Christian worship is new covenant worship; it is gospel-inspired worship;
it is Christ-centered worship; it is cross-focused worship.
-D. A. Carson

Worship is what we were created for. This is the final end of all existence-the worship of God. God created the universe so that it would display the worth of His glory. And He created us so that we would see this glory and reflect it by knowing and loving it-with all our heart and soul and mind and strength.
-John Piper

Worship is the  believer’s response  of all that they are – mind, emotions, will, body – to what God is and says and does.
-Warren Wiersbe

…acknowledging that someone or something else is greater – worth more – and by consequence, to be obeyed, feared, and adored… Worship is the sign that in giving myself completely to someone or something, I want to be mastered by it. 
-Harold Best

Worship is the submission of all our nature to God.
It is the quickening of conscience by His holiness; the nourishment of mind with His truth;
the purifying of imagination by His Beauty; the opening of the heart to His love;
the surrender of will to His purpose – and all of this gathered up in adoration, 
the most selfless emotion of which our nature is capable and therefore the chief remedy for that self-centeredness  which is our original sin  and the source of all actual sin.
-William Temple

Worship is the continuous outpouring of all that I am,
all that I do and all that I can ever become
in light of a chosen  or choosing god.
-Harold Best