Sorry, raising the B.S. flag here....
The Hebrews 6:6 verse was posted earlier in this post to say that you can lose your salvation? Re-read it. It says that you would be like requiring Christ to be crucified again ("afresh"), which would be "to an open shame" - in other words, you CAN'T lose your salvation or it would make Christ's death on the cross meaningless.
Also, "For by grace are ye saved, not of works, it is the gift of God, lest any man should boast" (Eph 2:5-6 I believe - going off memory here - it's in Ephesians, though).
That means it is our FREE GIFT to accept and nothing we do can change it - good to earn it, or bad to lose it.
"For God so loved the world that He gave His only begotten son, that whomsoever should believe in Him shall not perish, but have everlasting life." (John 3:16) That means WHOMEVER believes gets it, and that is ALL they have to do, or it would not be a GIFT if it required a constant re-dedication. It is not of yourselves to win or lose, but to just ACCEPT.
-Tom