I am doing a great work - Though he knew their design, he does not think it prudent to mention it. Had he done so, they would probably have gone to extremities, finding that they were discovered; and perhaps in a formidable body attacked Jerusalem, when ill provided to sustain such a shock. They wished to effect their purpose rather by treachery than by open violence. I know not any language which a man who is employed on important labors can use more suitably, as an answer to the thousand invitations and provocations he may have to remit his work, enter into useless or trivial conferences, or notice weak, wicked, and malicious attacks on his work and his motives: "I am doing a great work, so I cannot stoop to your nonsense, or notice your malevolence. Why should the work cease, while I leave it, and come down to such as you?"

And I sent messengers unto them,.... He did not show any open contempt of them, nor did he even return answer by the messenger that came from them, but sent some of his own people to them:

saying, I am doing a great work; was about an affair of great importance, very busy, and not at leisure to give them a meeting:

so that I cannot come down; Jerusalem being built on an eminence, and the place proposed to meet at in a plain, going thither is expressed by coming down:

why should the work cease, while I leave it, and come down to you? signifying that it would cease if he left it; and it being of greater consequence than anything they could have to converse about, he argues it would be wrong to relinquish it on such an account; this was the reason he thought fit to give, but was not the only, nor the principal reason, which is suggested in the preceding verse.

Nehemiah sent messengers to them, saying: "I am doing a great work, and I cannot come down thither. Why should the work cease whilst I leave it and come down to you?" That is, he let them know that he could not undertake the journey, because his presence in Jerusalem was necessary for the uninterrupted prosecution of the work of building.

And I sent messengers unto them, saying, I am doing a great work, so that I cannot come down: {b} why should the work cease, whilst I leave it, and come down to you?

(b) Meaning, that if he obeyed their request, the work God had appointed would cease: showing by this that we should not commit ourselves to the hands of the wicked.

6:1-9 Let those who are tempted to idle merry meetings by vain companions, thus answer the temptation, We have work to do, and must not neglect it. We must never suffer ourselves to be overcome, by repeated urgency, to do anything sinful or imprudent; but when attacked with the same temptation, must resist it with the same reason and resolution. It is common for that which is desired only by the malicious, to be falsely represented by them as desired by the many. But Nehemiah knew at what they aimed, he not only denied that such things were true, but that they were reported; he was better known than to be thus suspected. We must never omit any known duty for fear it should be misconstrued; but, while we keep a good conscience, let us trust God with our good name. God's people, though loaded with reproach, are not really fallen so low in reputation as some would have them thought to be. Nehemiah lifted up his heart to Heaven in a short prayer. When, in our Christian work and warfare, we enter upon any service or conflict, this is a good prayer, I have such a duty to do, such a temptation to grapple with; now, therefore, O God, strengthen my hands. Every temptation to draw us from duty, should quicken us the more to duty.