The simple fact is that without Christ we are dead (Eph 2:1) but with Christ we have eternal life (John 3:36). The struggle for true believers is not one of eternal security, but one of Kingdom effectiveness. A qualifier of spiritual maturity is the management of the continual difficulties associated with being alive in such a way that it does not keep you from effectively assisting with the advancing of His kingdom.
We need to be alive in Christ! That is living for every opportunity that He leads us to and not weighed down by the things in this world that can distract us. If all you can see in your life is your problems, the only thing you are living for is the engagement of that problem. If all you are living for is problems, you cannot advance the kingdom and are essentially dead. Problems need to be managed and a true mark of spiritual maturity is perception management. This is the process for looking at problems the way that God does and understanding that to truly be alive in Christ I must be willing to not allow the problems of this world to make me ineffective. I must be willing to live in such a way that my problems don't define me but rather my identity in Christ does. Only then will I truly be alive!