The others have answered the question very well. All I can add is salvation is a gift Christ laid out for all, but like any gift we as an individual have to accept that gift. By accepting that gift it means living a life for christ, choosing to do good, loving one another, etc.
At any time we have choices, good or evil and if we choose evil, we are choosing to tell Christ thank you for the gift, but I reject that gift.
His grace is great enough to allow us the freedom to reject that gift. His grace is also great enough to leave the gift lying there for us to accept over and over again.
Look at the apostles, they all rejected the gift one way or another and except for Judas they all came back and accepted the gift again.
His grace is also great enough to leave the gift lying there for us to accept over and over again.
Ummm ... no ...Hebrews 6:4 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,Look at the apostles, they all rejected the gift one way or another and except for Judas they all came back and accepted the gift again.
5 And have tasted the good word of God, and the powers of the world to come,
6 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.
Can you recall any apostle that did this ?