We must return, however, for a few paragraphs to the general consideration of what may be called our pre-rational beliefs.[ae] That they are pre-rational (account for them as we will), is evident since from them spring our first tendencies to reason in special directions, and our first ability to receive and assimilate such mental food as may be afforded us. "The primary facts of intelligence,"--says Sir W. Hamilton, "the facts which precede, as they afford the conditions of, all knowledge,--would not be original were they revealed to us under any other form than that of natural or necessary beliefs."[159] A central point this; and one most essential for the Psychologist! Indeed, every one who explains such beliefs into laws of association, commits the oversight of refining away the chief fact involved in those laws themselves. For, the very idea of association presupposes a guiding impulse. How can we classify without a standard of classification, arrange or connect without threads of connection or arrangement? Laws of association must cluster round an associating principle, just as translucent halos encircle the Sun. Laws of association do not make principles; but an operative principle evokes associations, and manifests itself in their law. Oversights like this, and the one before noted by Mr. Bain, are examples of the paralogism incident to all attempts at explaining the inexplicable. In his eagerness, the metaphysical refiner subtilizes away the truth under analysis. Even so, in days of old, Alchemists used to sublimate the gold intended for transmuting inferior metals, till it flew off in elastic vapour, and all that _had been_ precious, vanished from the eager speculative man. A frequent issue this, to searchers after our true philosopher's stone.