Matthew 13:20-21 But he that received the seed into stony places, the same is he that heareth the word, and anon with joy receiveth it; Yet hath he not root in himself, but dureth for a while: for when tribulation or persecution ariseth because of the word, by and by he is offended.
2 Timothy 3:12 Yea, and all that will live godly in Christ Jesus shall suffer persecution.
Impressions that are not deep, will not be durable, but will wear off in suffering, trying times; like footsteps on the sand of the sea, which are gone the next high tide of persecution; when that iniquity doth abound, the love of many to the ways of God waxeth cold; many that keep their profession in fair days, lose it in a storm; and do as those that go to sea only for pleasure, come back again when the wind arises.
The following quote is by Christian martyr Michael Sattler. He proclaimed and defended the true Gospel of Jesus Christ. He came against the false gospel of Roman Catholicism. It cost him his life.
“… If the Turks should come, we ought not to resist them; for it is written: Thou shalt not kill. We must not defend ourselves against the Turks and others of our persecutors, but are to beseech God with earnest prayer to repel and resist them. But that I said, that if warring were right, I would rather take the field against the so-called Christians, who persecute, apprehend and kill pious Christians, than against the Turks, was for this reason: The Turk is a true Turk, knows nothing of the Christian faith; and is a Turk after the flesh; but you, who would be Christians, and who make your boast of Christ, persecute the pious witnesses of Christ, and are Turks after the spirit.”
Read about martyrs Michael Sattler and his wife Margaretha here.
Video: The Radicals
Note that persecution came from both the Roman Catholics and the Protestants.