33. We ‘speak with the Almighty,’ when we beseech His pity; but we ‘reason with Him,’ when uniting ourselves to His righteousness, we sift our actions with minute investigation. Or otherwise, to ‘reason with God,’ is for him who obeyed His commandments here, to come with Him hereafter as Judge to judge the people. As it is said to the Preachers that leave all things, Verily I say unto you, that ye which have followed Me, in the regeneration, when the Son of man shall sit on the throne of His glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel. [Matt. 19, 28] Whence the Lord saith by Isaiah too, Relieve the oppressed, judge the fatherless, plead for the widow. Come now, and let us reason together. [Is. 1, 17. 18.] For it is light that they should reason with God concerning their charges [d] in the Judgment, who, at the words of God, entirely give up the present world. Thus the ‘speaking’ has to do with prayer, and the ‘reasoning’ has to do with judgm...
This means, “I know the tremendous greatness of God, the endless wisdom of the Creator and his prodigious power; but even though I know that, ‘I will speak to the Lord,’ because if I know his power, I also know his justice. For he is just, he supports those who in the meantime, without rendering themselves accusers, speak to him. This teaches people that even though they are very righteous, they have to accept the judgments given to them. That is why ‘I will reason before him, if he wants to.’ For if he does not want, I will remain silent, because I know what is honorable to the servant. It is according to the command of the Lord that I will speak and will have the boldness to ‘reason before him.’ ” - "Homilies on Job 15.13.3"
