The second chapter of book three of theDe animamarks the end of Aristotle's discussion of sense-perception. The chapter is a long one and apparently rambling in subject matter. It begins with a passage that is usually taken as a discussion of some sort of self-awareness, particularly awareness that one is perceiving, although such an interpretation raises some difficulties. This paper reconsiders the problems raised by supposing that the question discussed in the first paragraph is ‘how do we perceive that we perceive?’, and suggests an alternative interpretation which would solve many of the difficulties and have the additional merit of restoring unity to the sequence of notes which go to make up the whole chapter.
The book is about three things. First, how Ancient thinkers perceived humans as like or unlike other animals; second about the justification for taking a humane attitude towards natural things; and third about how moral claims count as true, and how they can be discovered or acquired. Was Aristotle was right to see continuity in the psychological functions of animal and human souls? The question cannot be settled without taking a moral stance. As we can either focus on continuity or on discontinuities, how should natural science draw the boundaries? Moral agents act and react in a world that they see under a certain description, and there is no value free science that can settle what is the correct description. This book asks us to think about where moral justification could come from, and suggests that the supposed ‘moral status’ of the object cannot provide the answer. For the moral status of the object is a product of our own imagination, and once we see that, we also see that there remains the question where we ought to have the will to see it. Furthermore, since the perception of moral truth involves the development of imagination and will, the means to attain it will be better served by engagement with poetry and literature than with enquiries that seek to exclude the engagement of the imagination, or any appeal to the beauty of nature or the love of one's fellow creatures.
It is no longer generally believed that Empedocles was the divided character portrayed by nineteenth-century scholars, a man whose scientific and religious views were incompatible but untouched by each other. Yet it is still widely held that, however unitary his thought, nevertheless he still wrote more than one poem, and that his poems can be clearly divided between those which do, and those which do not, concern ‘religious matters’.1 Once this assumption can be shown to be shaky or actually false, the grounds for dividing the quotations of Empedocles into two poems by subject matter disappear; and without that division our interpretation of Empedocles stands in need of radical revision. This paper startswith the modest task of showing that Empedocles may have written only one philosophical poem and not two, and goes on to suggest some of the ways in which we have to rethink the whole story if he did. If all our material belongs to one poem we are bound to link the cycle of the daimones with that of the elements, and this has far-reaching consequences for our interpretation.
Recent studies ofretinal damage due to ultrashort laser pulses' have shown interesting behavior. Laser induced retinal damage for ultrashort (i.e. less than ins) laser pulses is produced at lower energies than in the nanosecond to microsecond laser pulse regime and the energy required for hemorrhagic lesions is much greater times greater than for the nanosecond regime. We investigated the tissue effects exhibited in histopathology ofretinal tissues exposed to ultrashort laser pulses.
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