L. Wait a little, Lucilla; that is difficult ground you are getting upon; and we must keep to our crystals, till at least we understand what their good and evil consist in; they may help us afterwards to some useful hints about our own.  I said that their goodness consisted chiefly in purity of substance, and perfectness of form:  but those are rather the effects of their goodness, than the goodness itself.  The inherent virtues of the crystals, resulting in these outer conditions, might really seem to be best described in the words we should use respecting living creatures—­ “force of heart” and “steadiness of purpose.”  There seem to be in some crystals, from the beginning, an unconquerable purity of vital power, and strength of crystal spirit.  Whatever dead substance, unacceptant of this energy, comes in their way, is either rejected, or forced to take some beautiful subordinate form; the purity of the crystal remains unsullied, and every atom of it bright with coherent energy.  Then the second condition is, that from the beginning of its whole structure, a fine crystal seems to have determined that it will be of a certain size and of a certain shape; it persists in this plan, and completes it.  Here is a perfect crystal of quartz for you.  It is of an unusual form, and one which it might seem very difficult to build—­a pyramid with convex sides, composed of other minor pyramids.  But there is not a flaw in its contour throughout; not one of its myriads of component sides but is as bright as a jeweler’s faceted work (and far finer, if you saw it close).  The crystal points are as sharp as javelins; their edges will cut glass with a touch.  Anything more resolute, consummate, determinate in form, cannot be conceived.  Here, on the other hand, is a crystal of the same substance, in a perfectly simple type of form—­a plain six-sided prism; but from its base to its point,—­and it is nine inches long,—­it has never for one instant made up its mind what thickness it will have.  It seems to have begun by making itself as thick as it thought possible with the quantity of material at command.  Still not being as thick as it would like to be, it has clumsily glued on more substance at one of its sides.  Then it has thinned itself, in a panic of economy; then puffed itself out again; then starved one side to enlarge another; then warped itself quite out of its first line.  Opaque, rough-surfaced, jagged on the edge, distorted in the spine, it exhibits a quite human image of decrepitude and dishonor; but the worst of all the signs of its decay and helplessness is that half-way up a parasite crystal, smaller, but just as sickly, has rooted itself in the side of the larger one, eating out a cavity round its root, and then growing backwards, or downwards contrary to the direction of the main crystal.  Yet I cannot trace the least difference in purity of substance between the first most noble stone, and this ignoble and dissolute one.  The impurity of the last is in its will, or want of will.