Acts 21:22
What is it therefore? the multitude must needs come together: for they will hear that thou art come.
What is it therefore?.... Is it true or not? or what must be done in this case? what method must be taken to remove these objections, and reconcile the minds of the people? the multitude must needs come together; either the whole church at Jerusalem, or the great confluence of people, even of believing Jews, that were come from all parts thither; there is no hindering of their coming together, to see the apostle, and to hear what he has to say to the objections against him, and complaints of him;
for they will hear that thou art come: this can never be kept a secret, and as soon as they hear it, they will flock in great numbers; they will come open mouthed, and be loud in their complaints, and it will be difficult to pacify them; there is danger in the case, the consequence may be bad; and therefore something must be done, to remove the opinion they had formed of the apostle, and the prejudice they had entertained against him; and therefore what follows is advised to.