Christian, in 1 Corinthians 15:58, Paul tells us that our labor is not in vain. The reason it is not in vain is not because we have results we can point to, but it is because the resurrection of Jesus gives our work meaning. So if you look for results, find none, and it appears that your labors have left you empty-handed, remember this—our labor is not in vain, not based on whether or not we are empty-handed. Our labor is not in vain because there is an empty grave.
1 Corinthians 15:58⠀58 Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord.