Nature is the Mediator and Measure of Knowledge

Natural things are the mediators between God's knowledge and our knowledge. For we receive our knowledge from natural things of which God, by his knowledge, is the cause. Wherefore, just as the knowable natural things are prior to our knowledge, and the measure of it, so God's knowledge is prior to and the measure of natural things. Just as a house is mediator between the knowledge of the builder who made it and the knowledge of one who receives his knowledge of the house from the house itself already made. St. Thomas Aquinas, Summa Theologica I, Q. 14, Art. 8, ad. 3.

For the human intellect is measured by things, so that a human concept is not true by reason of itself, but by reason of its being consonant with things, since an opinion is true or false according as it answers to the reality. But the Divine intellect is the measure of things: since each thing has so far truth in it, as it represents the Divine intellect, as was stated in I, Q. 16, Art. 1. Consequently the Divine intellect is true in itself; hence its essence is the truth itself. I-II, Q. 93, Art. 1, ad. 3.
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Res naturales sunt mediae inter scientiam Dei et scientiam nostram, nos enim scientiam accipimus a rebus naturalibus, quarum Deus per suam scientiam causa est. Unde, sicut scibilia naturalia sunt priora quam scientia nostra, et mensura eius, ita scientia Dei est prior quam res naturales, et mensura ipsarum. Sicut aliqua domus est media inter scientiam artificis qui eam fecit, et scientiam illius qui eius cognitionem ex ipsa iam facta capit.

Intellectus enim humanus est mensuratus a rebus, ut scilicet conceptus hominis non sit verus propter seipsum, sed dicitur verus ex hoc quod consonat rebus, ex hoc enim quod res est vel non est, opinio vera vel falsa est. Intellectus vero divinus est mensura rerum, quia unaquaeque res intantum habet de veritate, inquantum imitatur intellectum divinum, ut in primo dictum est. Et ideo intellectus divinus est verus secundum se. Unde ratio eius est ipsa veritas.

Hence the relationality of truth. Truth is the correspondence of the mind that knows a thing to the thing known. "Veritas est adaequatio rei et intellectus"

There is analogy here for Our Lady, God's greatest creature, the Mediatrix of All Graces!

The Church Affirms Mary, Co-Redemptrix --Bishop Schneider

Dr. Taylor Marshall, Is Mary the Mediatrix of All Graces?