1 Tim. 4:1 ¶ Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils; 2 Speaking lies in hypocrisy; having their conscience seared with a hot iron; Rom. 16:17 ¶ Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them. 18 For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple. Any true child of God can err! You can be a truly saved person and be a Roman Catholic, Methodist, Seventh Day Adventist, Baptist, etc, and be in error. No problem! However, Paul is not talking about a true child of God in the above verses but "wolves" dressed in sheeps clothing or a look alike "seed" which is a tare. It is easy to spot these kind of false professors. When they are confronted with the explicit teaching of God's Word their "seared conscience" and "their own belly" (figure for self-interests and desires) will make them manifest. They are so hardened and so self-centered in their defense of false doctrine that they will viciously repudiate self-evident explicit words of Scripture that condemn their demonic heresies. They will continue jerking the same scriptures of out context even when they have been exposed a 100 times over - makes no difference. They will deny the literal meaning of words and subvert them to mean the very opposite even though they are exposed a 100 times over. This consistency of hardness of conscience in spite of explicit and clear Biblical evidence is the fruit of such false teachers. These are not normal deceived Christians but these are those who are the deceivers who will not change regardless of what God's word says or regardless how many times they have been exposed as jerking a text out of context - they simply reassert their proof texts, their unfounded assertions, their open denials of what God's word actually says over and over and over again - impervious to truth. However, their primary characteristic is they deny the sufficiency of Christ's redemptive work by his own person and his own works to justify sinners from all condemnation by the law "FREELY BY HIS GRACE" "without" works by the believer - this is their calling card! This is their deep seated hatred toward Christ. I don't write to convert them as only God can do that, but to expose them for who they are and who is working through them..