I received a SOS call from a friend of mine a few days ago – her car had broken down. She had just come from dropping of her sister from school, but now, for some reason, it wouldn’t start. I went over to try and help. I tried everything I could think of – I checked the engine for loose cables, tried jump starting it and tried turning the key in inventive ways, but after a few minutes, I gave up, baffled and defeated. So I left, having been of no use at all.

About 30 minutes later, she sent me a message telling me that she had called the mechanic and when he arrived, he had simply switched on the ignition and the engine had come to life. No problem at all.

The point of this is not that I am useless when it comes to cars and engines, which I am, but that things are unreliable. I’m sure many of us have had the experience of trying to turn on your computer or phone in the morning, and failing, even though it had been working perfectly well the previous night. And it extends even to us as well –we make promises that we can’t keep and are quick to break our vows.

As a result, we find it difficult to trust anyone or anything. And unfortunately, we fail to trust even Jesus about our salvation.

Many of us probably struggle with understanding how completely forgiven we are in Jesus Christ. We might perhaps believe that God forgave us for the sins which we committed before we came to Christ, but not for our present or future sins. Or we look at our lives and somehow separate our sins into the little ones that have been forgiven and mega-sins that can never be forgiven.

We are unable to take God at his word when he declares in Romans 8:31 that nothing will ever separate us from the love of God in Christ Jesus. And so even though we have believed in him, we still think that our sins have the power to break our relationship with God.

The result of all of this is that we live with the incredible burden of guilt and sin that weighs us down. Therefore our participation in the kingdom of God is never whole hearted. You go through your life feeling like a second-rate citizen. You feel like an unwanted orphaned child, even though the Father says he has adopted as his child and Jesus calls you his friend, brother and sister.

Hebrews 10:1-18 was written to a group of believers who were failing to accept and appropriate the unbelievable riches that Christ had given them. They were on the verge of returning to a life of worship that could never make them clean or guarantee a perfect relationship with God.

They needed this message, just as we need to hear, and believe, that Jesus’ sacrifice assures you who have believed in him, that you will always be in perfect relationship with God because he has forgiven all your sins, forever and ever. This is the assurance that you have.

The first thing that you should have absolute certainty of in Jesus Christ, is that Jesus’ blood saves completely