Judges 15

"Samson was now very thirsty, and he cried out to the LORD, 'You have accomplished this great victory by the strength of your servant. Must I now die of thirst and fall into the hands of these pagans?'"
Samson was physically and emotionally exhausted. After a great personal victory, his attitude declined quickly into self-pity - "Must I die of thirst?" Emotionally, we are most vulnerable after a great effort or when faced with real physical needs. Severe depression often follows great achievements, so don't be surprised if you feel drained after a personal victory.

During these times of vulnerability, avoid the temptation to think that God owes you for your efforts. It was HIS strength that gave you the victory. Concentrate on keeping your attitudes, actions, and words focussed on God instead of yourself!