Please imagine a young boy who's mother is dealing with a malignant cancer. He feels very sad and has lost his morale recently and is not able to put enough time on his studies. After a long period of chemical therapy, the treatment process works and the mother is healed. The boy's spirit enhances and gets ready to continue his studies. Now, I would appreciate it if someone could let me know which one of the following sentences work here properly:
His spirit has been uplifted.
His spirit was boosted.
If they don't sound natural to you, then please let me know how a native speaker would normally explain such a situation?