Like many of the other questions with which we deal there is a great deal of confusion concerning the matter of falling from grace.  Much of the religious world has been taught that when a person becomes a child of God then they are permanently shielded from ever falling from that state.  With an open mind let us see what the Bible says on the matter.
    II Peter 3:17 is very explicit in dealing with those who might have a tendency to err from the truth.  Peter wrote, “Ye therefore, beloved, seeing ye know these things before, beware lest ye also, being led away with error of the wicked, fall from your own steadfastness.”  Notice that the people being addressed are already Christians (you cannot be led away from a location at which you are not) and that Peter’s fear is that they like others (“ye also”) will be led away because of  those who are wicked.  Furthermore notice the phrase “fall from your own steadfastness.”  What else can that mean then that a child of God can fall from a state of grace?
    Notice another passage:  I Corinthians 10:12.  Why would this admonition be given by Paul if there was no way that a person could fall from grace?  The verse reads, “Wherefore let him that thinketh he standeth take heed lest he fall.”
    If one cannot fall from grace how is Matthew 13:41,42 to be explained?  “The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend and them which do iniquity; And shall cast them into a furnace of fire:  there shall be weeping and gnashing of teeth.”  To be in God’s kingdom you must at some point be under His grace, and then to be removed from that kingdom would involve falling from that state of grace.
    This question is not a difficult one to address.  Verses like those above abound, and also like those above, need no commentary, they simply point out that one can fall from grace.  Such verses include but are not limited to I Timothy 4:1-3; II Timothy 4:4-10; Hebrews 3:13; II Peter 2:20-22.  Also there are many examples, in the New Testament alone, that demonstrate this principle:  Demas, Hymenaeus, Alexander, the Galatians, Simon the sorcerer, the prodigal son, and Judas.  The key for us is to do what God tells us so that we may become Christians, and then to live faithfully so that we can stay in that relationship with Him.