'Work' in the Bible

being confident of this very thing, that he who began a good work in you will perfect it until the day of Jesus Christ:

But if to live in the flesh, -- if this shall bring fruit from my work, then what I shall choose I know not.

So then, my beloved, even as ye have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling;

for it is God who worketh in you both to will and to work, for his good pleasure.

because for the work of Christ he came nigh unto death, hazarding his life to supply that which was lacking in your service toward me.