He shall baptize you with the Holy Ghost, and with fire - >Luke 3:16
They had received the negative, water; they were to receive the positive, fire. Water is not sufficient for natures such as ours. The Baptist pointed to a greater Baptist than himself. Jesus plunges the soul into a baptism of fire.
Fire cleanses. -
Fire illuminates. - As the express-train hurries the traveller by night through a district where the smelting furnaces are in full blast, his eyes are arrested by their glow, and the very heavens are lurid with the light, reflected for miles. So when the Spirit comes in power to the soul, He teaches us to know God, and truth, and things hidden from the wise and prudent. The fires that sanctify, illuminate us.
Fire enkindles. - It is contagious. It will spread over an immense area, where inflammable material attracts it. A match may light up a bonfire that will burn for hours. So when the Spirit of God touches a soul, like an unlit candle, it begins to glow; and from it the blessed spark may pass from heart to heart, and church to church, till an entire continent may blaze with heavenly fire.