 …the desire for knowledge cannot be said to grow in the proper sense, even if as was stated earlier it does expand in a certain way. This is because anything which grows in the proper sense is always one; the desire for knowledge is not always one but is many—when one is completed, another comes along—so that properly speaking, its expansion is not growth but a progression from something small to something large. For if I desire to know the principles of natural things, no sooner do I know them than this desire is satisfied and fulfilled. And if I subsequently desire to know the what and the how of each of these principles, this is another, new desire, the occurrence of which does nothing to take away the perfection to which the other desire led me; and this expansion is not a cause of imperfection, but of greater perfection or completeness.