Charles H. Spurgeon on Psalms 138:2

It is not with the truth merely excogitated, but with the truth expressed, that we have any concern; not with the truth as seen by our inspired teacher, but with the truth as by him spoken to us. It is not enough that the Spirit hath made him to see it aright —this is not enough if he have not also made him to speak it aright. A pure influx into the mind of an apostle is no sufficient guarantee for the instruction of the world, unless there be a pure afflux also; for not the doctrine that has flowed in, but the doctrine that has flowed out, is truly all that we have to do with. Accordingly, it is to the doctrine in afflux, that is to the word, that we are bidden to yield ourselves. It is the word that is a light unto our feet and a lamp unto our path; it is his word that God hath exalted above all his name; it is the word that he hath settled fast in heaven, and given to it a stability surer and more lasting than to the ordinances of nature. We can take no cognizance of the doctrine that is conveyed from heaven to earth, when it has only come the length of excogitation in the mind of an apostle; and it is not till brought the farther length of expression, either by speech or by writing, that it comes into contact with us. In short our immediate concern is with, not what apostles conceive inwardly, but what they bring forth outwardly —not with the schemes or the systems which they have been made to apprehend, but with the books which they have written; and had the whole force and effect of this observation been sufficiently pondered, we feel persuaded that the advocates of a mitigated inspiration would not have dissevered, as they have done, the inspiration of sentiment from the inspiration of language. —Thomas Chalmers.