But by the grace of God I am what I am, and His grace which was bestowed upon me was not in vain; but I labored more abundantly than they all -- yet not I, but the grace of God which was with me.

Therefore, my beloved brethren, be ye steadfast, unmovable, always abounding in the work of the Lord, for ye know that your labor is not in vain in the Lord.

And let us not be weary in welldoing, for in due season we shall reap, if we faint not.

for which I also labor, striving according to His working, which worketh in me mightily.