When Jesus tasted the gall He turned away. He would not drink the drug. He would finish the Father’s plan to its fullest course and its fullest cost. A short while later, when they nailed Him to the cross, someone gave Him the plain vinegar.
Think of it. Jesus was the Lord of Heaven. The King of the Universe. He never needed to thirst. Or hunger. Or suffer pain. Yet He demonstrated by His life and by His death a ‘hunger and thirst for righteousness.’ Even on the cross, He would accomplish His Father’s will. That is why His death – and His thirst – serves as an illustration for us.