Heb. 4:11 Let us do our best to enter that place of rest. For anyone who disobeys God as the people of Israel did, will fall.
This is a message that must be heard and believed. Disobedience is a major determing factor as to whether we will make it to heaven or not. Disobedience is sin and must be dealt with before God. There is no rest for the soul who does not obey God.
Now, in order to obey God, we must know what it is we are to do and not do in our walk of faith. There is no way we will know what to do if we don't spend adequate time in the Word of God. We must read it, meditate on it and listen to it as much as we can. It is impossible to know what God commands us to do by just listening to what others tell us. It is our responsibility to do all we can do to learn from God. The more we learn, the more we grow in faith and our ability to live it out.
We must do our best in our walk of faith. Most people do not do their best to obey God. No one perfectly obeys Him, but most people don't seem to care enough to put much effort into it. They take advantage of God's grace and believe they will get by with it. Holiness is not on the radar of their minds. They pay more attention to getting ahead in the world than they do getting ahead in faith.
People stumble and fall into sin simply because they do not obey God. They rely upon themselves for strength and quickly learn that it never works, but they keep doing it. Our only chance of living in victory over sin is to humbly strive to obey God in all things. We have no one to blame but ourselves when we fall.