It is always hard to swim against the stream; and if the effort be a moral one, the difficulty is not lessened. These early Christians were finding it so. For them there must have existed hardships of which to-day we can have no experience, and form but an imperfect estimate. If they lived among a Jewish population, these were sure to be offended at the new faith. And when we remember the zeal for persecution of a Saul of Tarsus, we can see that in many cases the better the Jew, the more would he feel himself bound, if possible, to exterminate the new doctrines. Among the heathen the lot of the Christians was often worse. Did the people listen a while to the teaching of the missionaries, yet so unstable were they that, as at Lystra, to-day might see them stoning those whom yesterday they were venerating as gods; and they could easily, by reason of their greater numbers, bring the magistrates to inflict penalties even where the multitude refrained from mob violence. The cry, "These men exceedingly trouble our city" or "These who turn the world upside down are come among us," was sure to find a ready audience; while the uproar and violence which raged in a city like Ephesus, when Paul and his companions preached there, shows how many temporal interests could be banded together against the Christian cause. On individual believers, not of the number of the preachers, the more violent attacks might not fall; but to suffer in the flesh was the lot of most of them in St. Peter's day. Hence the strong figure he employs to describe the preparation they will need: _Arm ye yourselves_--make you ready, for you are going forth to battle. St. Paul also, writing to Rome and Corinth, uses the same figure: "Let us put on the armour of light," "the armour of righteousness on the right hand and on the left."