49I have come to cast fire upon the earth, and how I wish that it were already kindled! 50I have a baptism with which to be baptized, and how greatly and sorely I am urged on (impelled, constrained) until it is accomplished! 51Do you suppose that I have come to give peace upon earth? No, I say to you, but rather division; 52For from now on in one house there will be five divided [among themselves], three against two and two against three. 53They will be divided, father against son and son against father, mother against daughter and daughter against mother, mother-in-law against her daughter-in-law and daughter-in-law against her mother-in-law. Luke 12:49-53 (Amplified Bible)
What "fire" is He bringing to the Earth? I assume the "baptism" is His sacrifice on the cross. Do verses 49-50 relate to the rest of the verses speaking about division? From what I understand, He's not here to bring the world's view of peace, but division from believer to unbeliever, but what is He trying to tell us concerning the divisions and strife within the household? I noticed he says "From now on...", and that my bible refers to Micah 7:6; is He fulfilling some prophesy? That chapter in Micah speaks of how the faithful have been swept from the land, and the time God visits them has come, and to not trust friend or neighbor, and a man's enemies are those in his own household. What is He trying to tell us?
The fire is the Holy Spirit who purifies and destroys. The imagery is the same as the water as the Word of God which destroys or gives life.
God first destroyed/purified the world with the flood representing the Word of God. The letter of the word kills, but the spirit gives life.
2Co 3:6 Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
We are condemned by the word of God.
The second destruction/purification comes by the Spirit who gives life. This started at the cross.
The divisions in the household are those caused by some coming to Christ and being made alive in the Spirit:
Mat 19:29 And every one that hath forsaken houses, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my name's sake, shall receive an hundredfold, and shall inherit everlasting life.
Mar 10:29 And Jesus answered and said, Verily I say unto you, There is no man that hath left house, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my sake, and the gospel's,
Mar 10:30 But he shall receive an hundredfold now in this time, houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions; and in the world to come eternal life.