We can say it in all kinds of ways. Can a leopard change its spots? Can a Tiger lose its stripes? Can a donkey suddenly become a zebra if we paint stripes on it?
The Proverb in Africa is that no matter how long a log floats in the river, it will never become a crocodile. In the book of Exodus, God shows Moses that a stick can become a snake. But only by the power of God. Only God can change a heart.
This has been brought home to me recently.The Bible speaks of those who hold to a form of godliness, but deny the power thereof. I have known a few of those, and I am guessing you have as well. The problem with seeking a form of godliness is that it is external. We can paint stripes on a donkey and try to cal him a zebra. But he is still a jackass on the inside. We can carve a log to look like a reptile and throw it in the river, but it is still a log. We are not to seek the form of godliness, but to seek God Himself. When we know Him, He will change our lives.