Chapter 4

Thus if, on the one hand, we look to the observed facts, what we have said makes it clear that the source of the sensitive soul, together with that connected with growth and nutrition, is situated¹ in this organ and in the central one of the three divisions of the body. But it follows by deduction² also; for we see that in every case, when several results are open to her, Nature always brings to pass the best. Now if both principles are located in the midst of the substance, the two parts of the body, viz. that which elaborates and that which receives the nutriment in its final form will best perform their appropriate function; for the soul will then be close to each, and the central situation which it will, as such, occupy is the position of a dominating power.

Further, that which employs an instrument and the instrument it employs must be distinct (and must be spatially³ diverse too, if possible, as in capacity), just as the flute⁴ and that which plays it-the hand-are diverse. Thus if animal is defined by the possession of sensitive soul, this soul must in the sanguineous animals be in the heart, and, in the bloodless ones, in the corresponding part of their body. But in animals all the members and the whole body possess some connate warmth of constitution, and hence when alive they are observed to be warm, but when dead and deprived of life they are the opposite. Indeed, the source of this warmth must be in the heart in sanguineous animals, and in the case of bloodless animals in the corresponding organ, for, though all parts of the body by means of their natural heat elaborate and concoct⁵ the nutriment, the governing organ takes the chief share in this process. Hence, though the other members become cold, life remains⁶; but when the warmth here is quenched⁷, death always ensues, because the source of heat in all the other members depends on this, and the soul is, as it were, set aglow⁸ with fire in this part, which in sanguineous animals is the heart and in the bloodless order the analogous⁹ member. Hence, of necessity, life must be coincident with the maintenance of heat, and what we call death is its destruction.

1 situated   

adj.坐落在...的，处于某种境地的

参考例句：

• The village is situated at the margin of a forest.村子位于森林的边缘。
• She is awkwardly situated.她的处境困难。

2 deduction   

n.减除，扣除，减除额；推论，推理，演绎

参考例句：

• No deduction in pay is made for absence due to illness.因病请假不扣工资。
• His deduction led him to the correct conclusion.他的推断使他得出正确的结论。

3 spatially   

空间地，存在于空间地

参考例句：

• A well-defined array of stable fringes results and the field is spatially coherent. 结果得到一组完全确定的稳定条纹，而光场是空间相干的。
• The units are collaged together by a serial tectonic spatially and temporally. 这些构造单元是由构造原因，依一定的时空序列拼贴在一起的。

4 flute   

n.长笛；v.吹笛

参考例句：

• He took out his flute, and blew at it.他拿出笛子吹了起来。
• There is an extensive repertoire of music written for the flute.有很多供长笛演奏的曲目。

5 concoct   

v.调合，制造

参考例句：

• I gave her a tip on how to concoct a new kind of soup.我教她配制一种新汤的诀窍。
• I began to concoct explanations of my own.我开始思考自己的解释。

6 remains   

n.剩余物，残留物；遗体，遗迹

参考例句：

• He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
• The remains of the meal were fed to the dog.残羹剩饭喂狗了。

7 quenched   

解（渴）( quench的过去式和过去分词 )； 终止（某事物）； （用水）扑灭（火焰等）； 将（热物体）放入水中急速冷却

参考例句：

• He quenched his thirst with a long drink of cold water. 他喝了好多冷水解渴。
• I quenched my thirst with a glass of cold beer. 我喝了一杯冰啤酒解渴。

8 aglow   

adj.发亮的；发红的；adv.发亮地

参考例句：

• The garden is aglow with many flowers.园中百花盛开。
• The sky was aglow with the setting sun.天空因夕阳映照而发红光。

9 analogous   

adj.相似的；类似的

参考例句：

• The two situations are roughly analogous.两种情況大致相似。
• The company is in a position closely analogous to that of its main rival.该公司与主要竞争对手的处境极为相似。