Ephesians 2

 For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast.  vv.8-9

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How do you know you are saved unto salvation?  All religions say that it is dependent on deeds or works you do.  Even many Christians think that if they are "good" they can get salvation.  BUT THAT'S NOT HOW CHRIST SAID ONE IS SAVED FOR ETERNITY.  It is by grace that we are saved. And what is grace?  Undeserved favor!  Something we don't deserve but we get offered anyway.  Yet even if it is offered we have to accept it, it's not just universalism where everyone will be saved no matter what.  Kind of like you get a present under the Christmas tree for you but if you never open it you never obtain the gift.   It's not just grace but grace through faith.  Faith in what?  Faith in Jesus Christ, who He says He is.  Faith in believing His words that He is God and that He is the only way to heaven.  It's accepting His gift of dying and rising for you, that He is the Only Savior and the Savior you need.  And it doesn't just stop there but says it is not by works.  Works is not just another way to heaven.  So do you rely on your works to save you or the saving work of Jesus He already did for you?  Why do you think most people rely on works and have a hard time accepting the gift of grace?