Thomas Guthrie on the simplicity and profundity of the Gospel

Now as with these parts of the human frame, so is it with the doctrines of the Gospel, in so far as they are intelligible to our understandings. Scattered over the pages of sacred Scripture, let them also be collected and arranged in systematic order, and how beautifully they fit! doctrine to doctrine, duty to duty; till, all connected with each other, all “members one of another,” they rise up into a form of perfect symmetry, and present that very system which, with minor differences but substantial unity, is embodied in the confessions, creeds, and catechisms of Evangelical Christendom. I have said, so far as they are intelligible to us; for it is ever to be borne in mind, that while the Gospel has shallows through which a child may wade and walk on his way to heaven, it has deep, dark, unfathomed pools, which no eye can penetrate, and where the first step takes a giant beyond his depth.

And

Does it not appear from this circumstance, that God intended his Word to be a subject of study as well as faith, and that man should find in its saving pages a field for the exercise of his highest faculties? We are commanded to compare “spiritual things with spiritual;” we are to “search the Scriptures,” to dig for their treasures, to dive for the pearls. Hence the prayer of David, “Give me understanding, that I may learn thy commandments.”

The Gospel in Ezekiel