A series of very controversial verses are attached to this idea of " proceeding forward"

Heb. 6: 4-6  "For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, And have tasted the good word of God, and powers of the world to come, if they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame."

 It sounds like if you were redeemed and then sinned that all hope is gone.  If so we are all doomed.  I don't think that's what it says at all.  I believe the verses are pretty clear.  He says that if:

1.  You have given your life to God, and you have been enlightened (you understand the purpose of Christ's coming and have accepted the conditions that He preached and God commanded)
2.  You have "tasted" the gift of God's Spirit--the Holy Ghost.
3.  Have "tasted" the good Word of God and His power concerning life in his coming kingdom.

Then, it is impossible to "fall away".  You are always under the conviction of the Holy Spirit concerning sin.  You can't go back there any more.  And the concept of "repentance" is that once you have repented you are changed.  You don't want to rebel.  Your heart just isn't in it.  When you do a wrong thing, God's Spirit convicts you, you confess your remorse, and as a loving Father, he forgives you.  You may have broken your fellowship with Him, but there is no way you can break the relationship.  You are His.  He owns you.  The Bible says you have been bought with a price.

If you had to do all of the steps leading to your salvation again and again every time you do something wrong, then Christ would have to be crucified again and again.  What would be the point of His death in the first place?  That's the religion the Jews already had.  The Messiah came to be the sacrificial Lamb.  Once.  Not over and over again.