Quantitative life, viewed biologically, _i.e._, individually, does not mean an ideal quantitative life, but the most that an individual organism can get. This depends upon the organism's own nature and capacities, and upon the nature of the environment. That some descendents some day may have other natures and other surroundings, is not to the point. The presence of subjective surroundings in the environment affects the individual according to the nature of his own feelings: it affects him in the first place according to his possession or non-possession of sympathy, and in the second place according to his position of command or subserviency. If Biology takes cognisance of Ethics, it is from a prudential point of view alone. It means a recognition of the penalties of legal enactments or social laws. As a matter of calculation it takes account of the consequences of actions, and the conduct varies accordingly. And if we are unable to accept the biological view as identical with the fundamentals of Ethics, so we are unable to accept the correlative that the preponderance of pleasurable feelings is indicative of the ethically correct life. For this criterion again is relative to the individual, and prescribes that course of conduct which to him is most largely pleasurable. It is only ethical when the surrounding conditions are such as to make the personally pleasurable harmonise with what is also pleasurable to the subjective environment--again showing the external or social origin and authority of the ethical imperative.