do any of you believe in eternal security of the believer or do you believe you can "lose" your salvation?

Answer 1

If you have before a child of God how could you become a non-child? Once you are truly regenerate (Born Again). You can't be unborn..

Answer 2

It's called the Unpardonable Sin, it is hard to Commit, Baby Children of GOD (Christian's) cannot commit this Sin.
You have to Learn quite a lot and Experience some Spiritual Thing's of GOD-----You have to GROW Spiritually to a High Enough Position in the Lord, befor you can ever commit this Sin.

Adam Commited the Unpardonable Sin.
Sinning, like Drunkenness, Murder, Lying, being Gay, Cheating, Stealing etc. is not the Unpardonable Sin. These sin's will bring Curse's down on you, but will not Seperate you Eternally from GOD, IF you have been Born-Again to begin with, and some sin's cut your Physical Life short on this EARTH.
To Commit the UNPARDONABLE SIN, you have to Grow in Christ past a certain Point Spiritually, THEN walk away from JESUS on PURPOSE, not wanting HIM, the Family, the HOLY SPIRIT so on so on, and then Keep on Walking away, eventually, you will become LOST Again Big Time, and JESUS cannot DIE for YOU two time's (it's in the BIBLE) even though HE would if HE could, cause HE Love's us.

Two way's to commit it:
1. Never get SAVED (Spirit Recreated, Born-Again), through what JESUS Provided by Dying on the Cross.
2. Get Born-Again, GROW in CHRIST past the Point that you are Able to Commit the Unpardonable Sin, then do it----Walk away from JESUS and all that HE is, ON PURPOSE, knowing what you are doing, and then keep on going away.
Hope this helps.