Beware of All False Doctrine

"Truly the Lord has said, "He that does not forsake everything is not worthy of me;" for the Lord well knew that it would come hard to the flesh. But I hope that the Lord will also help me through even as He has helped many, and for which I can simply trust Him. Oh, how easy it is to be a Christian, so long as the flesh is not put to the trial, or nothing has to be relinquished; then it is an easy thing to be a Christian."

"Oh, regard not the great multitude, or the ancient custom, but look at the little flock, which is persecuted for the word of the Lord, for the good persecute none, but are persecuted. When you have joined them, beware of all false doctrine, for John says, "Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. .He that abideth in the doctrine of Christ, he hath both the Father and the Son." II John 9. The doctrine of Christ is mercy, peace, purity, faith, meekness, humbleness, and full obedience to God."

--Quotations: Martyrs' Mirror
Letters written by Maeyken Wens to her family before being burned at the stake for her faith
The first quotation is from a letter to her husband; the second is from a letter to her son.