He took it into his hands, and went on, eating as he went; and he came to his father and mother, and gave to them, and they ate: but he didn't tell them that he had taken the honey out of the body of the lion.
Even though God strengthened him, Samson used that strength for his own purposes, not to fulfill God’s will. Note David’s very different reaction to God enabling him to kill a lion and a bear in 1 Samuel 17:34-37.