(19) Now, as God tells Moses that He was not known to the patriarchs by the name of Jehovah, it follows that they were not cognizant of any attribute of God which expresses His absolute essence, but only of His deeds and promises that is, of His power, as manifested in visible things. (20) God does not thus speak to Moses in order to accuse the patriarchs of infidelity, but, on the contrary, as a means of extolling their belief and faith, inasmuch as, though they possessed no extraordinary knowledge of God (such as Moses had), they yet accepted His promises as fixed and certain; whereas Moses, though his thoughts about God were more exalted, nevertheless doubted about the Divine promises, and complained to God that, instead of the promised deliverance, the prospects of the Israelites had darkened. (21) As the patriarchs did not know the distinctive name of God, and as God mentions the fact to Moses, in praise of their faith and single-heartedness, and in contrast to the extraordinary grace granted to Moses, it follows, as we stated at first, that men are not bound by, decree to have knowledge of the attributes of God, such knowledge being only granted to a few of the faithful: it is hardly worth while to quote further examples from Scripture, for everyone must recognize that knowledge of God is not equal among all good men. (22) Moreover, a man cannot be ordered to be wise any more than he can be ordered to live and exist. (23) Men, women, and children are all alike able to obey by commandment, but not to be wise. If any tell us that it is not necessary to understand the Divine attributes, but that we must believe them simply, without proof, he is plainly trifling. (24) For what is invisible and can only be perceived by the mind, cannot be apprehended by any other means than proofs; if these are absent the object remains ungrasped; the repetition of what has been heard on such subjects no more indicates or attains to their meaning than the words of a parrot or a puppet speaking without sense or signification.