Paul wrote to the Corinthian believers:
“Therefore, my beloved brethren, be ye steadfast, unmovable, always abounding in the work of the Lord, forasmuch as ye know that your labor is not in vain in the Lord” (I Cor. 15:58).
This stirring appeal of Paul to Christians everywhere (I Cor. 1:2), implies that there is a tendency to abandon the work of the Lord through discouragement or carelessness, for he pleads with us to be “steadfast,” and “unmovable” — not easily shaken, reminding us that our “labor is not in vain in the Lord.”
How we need the exhortation!
We do not soon abandon our businesses or our homes. We work on in spite of difficulties and obstacles, and when the outlook is darkest we often toil the hardest. Sometimes our bodies suffer for it, but we do not immediately give up.
If this is so where our own affairs are concerned, how much more should it be so where the things of God and the needy multitudes about us are concerned! If it is so where temporal matters are concerned, how much more should it be so where eternity is involved!
Christians, let us awake! Let us “buy up the time!” Life is too short to fritter away the precious moments. Let us rather neglect our own affairs than to neglect the work of the Lord and the perishing souls about us. source