Because he loves us. Yes, our hearts can be transformed. Divided hearts can become undivided, slow hearts can burn for God. Sad hearts can become glad. Fainting hearts can become willing.
Calloused hearts can become tender.
Prideful hearts can become humble. Stinginess can turn to generosity, pollution to purity. Love can cast out fear, anger can turn to compassion, and foolishness to wisdom. The Great Physician is waiting. His appointment book is not too full for you.