John warns that a time of reckoning has come. The coming of the Messiah marked the beginning of the end of the period of special privilege for a nation that was largely unconverted.
Ryle comments that John speaks to his hearers about hell and danger. He says, ‘The subject of hell is always offensive to human nature. The minister who dwells much upon it, must expect to find himself regarded as coarse, violent, unfeeling, and narrow-minded. Men love to hear ‘smooth things,’ and to be told of peace, and not of danger (Isa. 30:10). But the subject is one that ought not to be kept back if we desire to do good to souls.’