Salt is something presented to God: every sacrifice must be salted with salt (Lev. 2). There may be much fruit where there is little or no service. See the blessed man in the first Psalm. The church and Christ are one. Everything of Christ in us is fruitful. Real service is fruit; but all is not service which seems to be so.
Whatever of Christ is naturally seen in us is fruit. God works in us by His Spirit, by giving us those desires that lead us into like mindedness with Jesus.
I rejoice in the thought that every setting sun is bringing us nearer and nearer to a world where suns will never set—where we shall walk together forever in an atmosphere of light and glory—where all the desire, longings, and hope of our hearts will be fully met! How blessed to feel that we have such a hope! How wonderful, that while the world around us is following after shadows, and walking in a vain show, we know and love the truth! That ours are hopes which will not, cannot deceive.