"There is no such thing as perpetual tranquillity of mind while we live here; because life itself is but motion, and can never be without desire, nor without fear, no more than without sense"

In this quote, Thomas Hobbes is exploring the nature of human experience and the fundamental restlessness of the human mind. He suggests that real, long lasting peace of mind ("continuous tranquillity") is unattainable in life because the nature of life itself is bound to movement and change. This dynamic state of existence is never ever really still or calm, as life continually includes movement and improvement.

Hobbes argues that life, being continuous movement, is inextricably related to desire and worry. Desires are the driving forces that propel individuals to seek modification or pursue particular goals, while fears are the apprehensions about prospective hazards or the effects of certain actions. Both feelings are natural companions to the consistent motion of life, suggesting that the mind is always in flux, processing and reacting to different stimuli.

Additionally, Hobbes indicates that the existence of senses makes sure that people are constantly engaged with the world around them. Our senses continually soak up and analyze the environment, driving our ideas and actions. This sensory engagement prompts ongoing cycles of desiring (desire) and worrying (fear), showing that serenity, if understood as a complete lack of these states, is an illusion.

Hence, Hobbes underscores the concept that human life is a limitless interaction of desires and worries, spurred on by the physical and affective interactions that define existence. The ramification is that while we can not accomplish eternal comfort, understanding the inevitability of desire and fear in life can offer insight into the human condition. Approval of this flux allows for a more reasonable pursuit of peace, acknowledging that serenity is momentary, a break instead of an irreversible state. This point of view encourages a more thoughtful self-view, acknowledging that our really humanity is marked by consistent settlement with the dual currents of longing and apprehension.