Does losing your faith mean losing your salvation?


Hello, I was reading I Timothy and came across mention of Hymenaeus and Alexander.  Not knowing anything about them, I did a google search and found your site with your explanation of them.  In it you  say that it is possible to lose one’s faith as seen in Hymenaeus, Alexander and Philetus.  Does that also mean lose one’s salvation?  What is your opinion on this.  I have always believed once saved always saved. 


Since God said, "But without faith it is impossible to please Him, for he who comes to God must believe that He is, and that He is a rewarder of those who diligently seek Him" (Hebrews 11:6). It would seem obvious that a person without faith is without salvation. The book of Hebrews is especially filled with warnings that we must retain our faith. "Therefore, since a promise remains of entering His rest, let us fear lest any of you seem to have come short of it. For indeed the gospel was preached to us as well as to them; but the word which they heard did not profit them, not being mixed with faith in those who heard it" (Hebrews 4:1-2). And also, "Pursue peace with all people, and holiness, without which no one will see the Lord: looking carefully lest anyone fall short of the grace of God; lest any root of bitterness springing up cause trouble, and by this many become defiled" (Hebrews 12:14-15).