Judges 16:17

 That he told her all his heart, and said unto her, There hath not come a razor upon mine head; for I have been a Nazarite unto God from my mother's womb: if I be shaven, then my strength will go from me, and I shall become weak, and be like any other man. 

Samson gave away what he believe to be the source of his strength. He turned against God and his vow to him and told Delilah about his hair. He let his lust and desire cloud  his judgement and blind him from his vow towards God. A lot of us have let this world cloud our view from God, and we have let pride and ego turn us away from the vow we took to serve Jesus. I am glad that the cloud has been lifted from me.