Charles H. Spurgeon on Psalms 119:108

Accept...the freewill offerings of my mouth, O Lord. It is a great grace that the Lord should accept anything from us, if we consider these three things: First, who the Lord is; next, what we are; thirdly, what it is we have to give unto him.

As for the Lord, he is all sufficient, and stands in need of nothing we can give him. Our goodness extends not to the Lord

As for us, we are poor creatures, living by his liberality; yea, begging from all the rest of his creatures; from the sun and moon; from the air, the water, and the earth; from fowls and fishes; yea, from the worms: some give us light, some meat, some clothes; and are such beggars as we meet to give to a king?

And, thirdly, if we well consider, What is it that we give? Have we anything to give but that which we have received from him? and whereof we may say with David, "O Lord, all things are of thee, and of thine own have we given thee again" (1 Chronicles 29:14). Let this humble us, and restrain us from that vain conceit of meriting at God's hand.

David at this time, in his great necessity, having no other sacrifice to offer unto the Lord, offers him the calves of his lips; but no doubt, when he might, he offered more.

There is nothing so small, but if it come from a good heart, God will accept it: the widow's mite, a cup of cold water; yea, and the praise of our lips, although it has no other external oblation joined with it: but where men may do more, and will not, it is an argument that their heart is not sincerely affected toward him, and their praises are not welcome to him. William Cowper.