without
the moral law to which they refer,--which law we call the Conscience;
nor could we have the idea of a moral law without a moral lawgiver,
and, if moral, then intelligent, and, if intelligent, then personal;
in a word, we could not now have, as we know we have, the idea of
conscience, without an objective, personal God. Such ideas may well be
called revelations, since, without any perceived assimilant, we find
them equally affirmed with those ideas which relate to the purely
physical.

But here it may be asked, How are we to distinguish an Idea from a mere
_notion_? We answer, By its self-affirmation. For an ideal truth, having
its own evidence in itself, can neither be proved nor disproved by any
thing out of itself; whatever, then, impresses the mind _as_ truth, _is_
truth until it can be _shown_ to be false; and consequently, in the
converse, whatever can be brought into the sphere of the understanding, as
a dialectic subject, is not an Idea. It will be observed, however, that we
do not say an idea may not be denied; but to deny is not to disprove. Many
things are denied in direct contradiction to fact; for the mind can
command, and in no measured degree, the power of self-blinding, so that it
cannot see what is actually before it. This is a psychological fact, which
may be attested by thousands, who can well remember the time when they had
once clearly discerned what has now vanished from their minds. Nor does
the actual cessation of these primeval forms, or the after presence of
their fragmentary, nay, disfigured relics, disprove their reality, or
their original integrity, as we could not else call them up in their
proper forms at any future time, to the reacknowledging their truth: a
_resuscitation_ and result, so to speak, which many have experienced.

In conclusion: though it be but one and the same Power that prescribes
the form and determines the truth of all Ideas, there is yet an
essential difference between the two classes of ideas to which we have
referred; for it may well be doubted whether any Primary Idea can ever
be fully realized by a finite mind,--at least in the present state.
Take, for instance, the idea of beauty. In its highest form, as
presented to the consciousness, we still find it referring to
something beyond and above itself, as if it were but an approximation
to a still higher form. The truth of this, we think, will be
particularly felt by the artist, whether poet or painter, whose