Erasmus Darwin - Zoonomia (1794)

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The great CREATOR of all things has infinitely diversified the works of his hands, but has at the same time stamped a certain similitude on the features of nature, that demonstrates to us, that the whole is one family of one parent.

Erasmus Darwin
Would it be too bold to imagine that, in the great length of time since the earth began to exist, perhaps millions of ages before the commencement of the history of mankind would it be too bold to imagine that all warm-blooded animals have arisen from one living filament, which the great First Cause endued with animality, with the power of acquiring new parts, attended with new propensities, directed by irritations, sensations, volitions and associations, and thus possessing the faculty of continuing to improve by its own inherent activity, and of delivering down these improvements by generation to its posterity, world without end!

Erasmus Darwin
For if we may compare infinities, it would seem to require a greater infinity of power to cause the causes of effects, than to cause the effects themselves. This idea is analogous to the improving excellence observable in every part of the creation; such as in the progressive increase of the solid or habitable parts of the earth from water; and in the progressive increase of the wisdom and happiness of its inhabitants; and is consonant to the idea of our present situation being a state of probation, which by our exertion we may improve, and are consequently responsible for our actions.

Erasmus Darwin
All animals undergo perpetual transformations; which are in part produced by their own exertions... and many of these acquired forms or propensities are transmitted to their posterity.

Erasmus Darwin
Owing to the imperfection of language the offspring is termed a new animal, but it is in truth a branch or elongation of the parent; since a part of the embryon-animal is, or was, a part of the parent; and therefore in strict language it cannot be said to be entirely new at the time of its production; and therefore it may retain some of the habits of the parent-system. (1794)

Erasmus Darwin
The hypochondriac disease consists in indigestion and consequent flatulency, with anxiety or want of pleasurable sensation.

Erasmus Darwin
There are some modern practitioners, who declaim against medical theory in general, not considering that to think is to theorize; and that no one can direct a method of cure to a person labouring under disease, without thinking, that is, without theorizing; and happy therefore is the patient, whose physician possesses the best theory.

Erasmus Darwin