Why don't we change? We know God is perfect, and His ways are best. The big reason we don't change is we believe the world's view of abundance, not God's. Jesus talks about the abundant life in John 10:10, the same as the Apostle Peter talks about in 2 Peter 1.
If you want the abundant life, you will pursue transformation into the image of Christ. When Peter says, "For this very reason..." (2 Peter 1:5), he refers to the previous four verses. He tells us what we have been given; a precious faith like the apostles, all things for life and godliness, exceedingly great and precious promises, partake in the divine nature, and escape from corruption in this world. We read that those priceless gifts are ours, but we still don't change.