Preserve therefore the proper order of thy knowledge, and do not, as being ignorant of things really good, seek to rise above God Himself, for He cannot be surpassed; nor do thou seek after any one above the Creator, for thou wilt not discover such. For thy Former cannot be contained within limits; nor, although thou shouldst measure all this [universe], and pass through all His creation, and consider it in all its depth, and height, and length, wouldst thou be able to conceive of any other above the Father Himself. For thou wilt not be able to think Him fully out, but, indulging in trains of reflection opposed to thy nature, thou wilt prove thyself foolish; and if thou persevere in such a course, thou wilt fall into utter madness, whilst thou deemest thyself loftier and greater than thy Creator, and imaginest that thou canst penetrate beyond His dominions.
Irenaeus, Adversus Haereses, Book II, chapter xv.
