linguistic:paraphrasing
In Paris (1629–1637)

Hobbes soon (in 1629) found work as a tutor to Gervase Clifton, the son of Sir Gervase Clifton, 1st Baronet, mostly spent in Paris, until November 1630. Thereafter, he again found work with the Cavendish family, tutoring William Cavendish, 3rd Earl of Devonshire, the eldest son of his previous pupil. Over the next seven years, as well as tutoring, he expanded his own knowledge of philosophy, awakening in him curiosity over key philosophic debates. He visited Galileo Galilei in Florence while he was under house arrest upon condemnation, in 1636, and was later a regular debater in philosophic groups in Paris, held together by Marin Mersenne.

Hobbes's first area of study was an interest in the physical doctrine of motion and physical momentum. Despite his interest in this phenomenon, he disdained experimental work as in physics. He went on to conceive the system of thought to the elaboration of which he would devote his life. His scheme was first to work out, in a separate treatise, a systematic doctrine of body, showing how physical phenomena were universally explicable in terms of motion, at least as motion or mechanical action was then understood. He then singled out Man from the realm of Nature and plants. Then, in another treatise, he showed what specific bodily motions were involved in the production of the peculiar phenomena of sensation, knowledge, affections and passions whereby Man came into relation with Man. Finally, he considered, in his crowning treatise, how Men were moved to enter into society, and argued how this must be regulated if people were not to fall back into "brutishness and misery". Thus he proposed to unite the separate phenomena of Body, Man, and the State.