I Chronicles 29:14 But who am I, and what is my people, that we should be able to offer so willingly after this sort? for all things come of thee, and of thine own have we given thee.
All that I can dedicate to God is what He has already given me. It should not be considered a great thing to give Him my life or my money since all that I have or am comes from Him.
We so often make the mistake of feeling that we are doing God a service but David fully realized that of His own we are giving to Him. Worship Him.
Realize that He is God and what we have and give is but little since He gave His Son and further all that we have to us.