[Samson’s] life collapsed under the weight of his pride. God gave him an amazing gift, but he let that gift go to his head. He saw it as God’s personal endorsement of him. He assumed God would keep blessing him even though one by one he broke every Nazirite vow.
Samson believed God would be faithful to his word, but Samson didn’t believe he needed to be faithful to God’s word. He trusted God to empower his gifting, but he didn’t trust God to satisfy his appetites. So he disobeyed God and indulged sin. He was already blind when the Philistines finally got to him.