Test yourself. What is your mindset? Do you begin with God and his rights and goals? Or do you begin with yourself and your rights and wishes?
And when you look at the death of Christ, what happens? Does your joy really come from translating this awesome divine work into a boost for self-esteem? Or are you drawn up out of yourself and filled with wonder and reverence and worship that here in the death of Jesus is the deepest, clearest declaration of the infinite esteem of God for his glory and for his Son?
Here is a great objective foundation for the full assurance of hope: the forgiveness of sins is grounded, finally, not in my finite worth or work, but in the infinite worth of the righteousness of God, God's unswerving allegiance to uphold and vindicate the glory of his name.
I appeal to you with all my heart, take your stand on this. Base your life on this. Ground your hope in this. You will be free from the futile mindset of the world. And you will never fall.
When God's exaltation of God in Christ is your joy, it can never fail.