Yes, you can loose your salvation!
Contrary to the 'once saved always saved' deception being spewed forth these days, we can loose our salvation and our name blotted out of the book of life.
In Revelation 3:5, Jesus says, "He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels."
Revelation 20:15 says, "And whosoever was not found written in the book of life was cast into the lake of fire."
Romans 6:16 says, "Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?"
So we a choice: to be a servant of sin unto death or of obedience unto righteousness.
1 Corinthinans 6:9-10 says, "Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God."
And Galatians 5:19 says, "Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God."
"And if the righteous scarcely be saved, where shall the ungodly and the sinner appear?" 1 Peter 4:18
The Bible says if we live in the Spirit, let us walk in the Spirit and many will wake up one day shocked to discover that God considers them not under grace but under the law and its condemnation because they refused to walk in the new life Jesus shed his blood to provide for them.
13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.