Where else shall we look for that holy fire in human life? I think I should look for the presence of the fire of the Holy Ghost in fervent enthusiasm for the cause of Christ's Kingdom. And that indeed is what I find. The New Testament instructs me in this, and it teaches me that where man is baptized with the Holy Spirit and with fire his own spirit becomes fervent. He is declared to be "_fervent_ in spirit," and the original word means to bubble up, to boil, as in a boiling kettle; it is the emergence of the mighty power of steam. And so the significance is this: the fire of God generates steam, it creates driving power, it produces forceful and invincible enthusiasm. You will find abundant examples of this spiritual miracle in the Acts of the Apostles; perhaps the Book might be more truly named "The Acts of the Holy Spirit," for all the glorious activity is generated by His holy fire. Let your eyes glance over the apostolic record. Mark how the fire of God endows man with the power of magnificent initiative. Take the apostle Peter;--once his strength was the strength of impulse, a spurt and then a collapse, a spasm and then a retreat, proud beginnings bereft of patience and perseverance. But see him when the Spirit of God has got hold upon him, and what a gift he has received of initial and sustained enthusiasm! "And Peter, filled with the Holy Spirit!" You should see him then, and note the strength of his drive, and the ardour of his enterprise! And the example of Peter would be confirmed by the examples of all the other apostles, if only we knew their personal history and experience. I wish there had been given to us just a glimpse of doubting Thomas, slow, hesitant, reluctant, uncertain, when the Holy Spirit had him in possession. "And Thomas filled with the Holy Spirit,"--I would give something to know the end of that sentence. And I wish we had one glimpse of timid, fearful, night-walking Nicodemus, when the fire of God's Spirit blazed in his soul. "Then Nicodemus, filled with the Holy Spirit,"--I wonder what notable exploits would complete that unfinished sentence. This we know; the holy fire transformed the timid into the courageous, the lukewarm into the fervent, it generated a moral steam which made them invincible.