"It is a great pity but tis certain from every day's observation of man, that he may be set on fire like a candle, at either end provided there is a sufficient wick standing out"

Laurence Sterne's quote uses a metaphorical and somewhat amusing commentary on humanity and behavior. The imagery of a man being "set on fire like a candle light, at either end" suggests vulnerability to emotional or mental influence, highlighting how people can be driven or consumed by different forces or circumstances.

The "candle light" metaphor implies that simply as a candle light can burn vibrantly when lit, humans can have intense and enthusiastic responses when "sparked" by specific triggers. The reference to a "adequate wick" symbolizes that individuals need only the best conditions or justifications to respond passionately or destructively. This wick could signify psychological level of sensitivities, vulnerabilities, or predispositions that enable such reactions.

The concept of being set on fire "at either end" suggests double susceptibility. Individuals can be influenced or driven by both external elements-- like societal pressures, temptations, or challenges-- and internal factors-- such as personal desires, worries, or beliefs. This duality highlights the intricacy of humanity, where people might face conflicting desires or pressures pulling them in different instructions, often resulting in their metaphorical 'burn-out.'.

Sterne's usage of the term "every day's observation" indicates his belief that this condition is a typical and observable human characteristic. Regardless of its apparently simple analogy, this observation may indicate a much deeper philosophical view on the human condition: that individuals are frequently at the grace of their passions or circumstances, even to the point of possible self-destruction.

In a more comprehensive sense, the quote can be viewed as a cautionary message about the threats of giving in too easily to justifications or impacts. It recommends that awareness and self-discipline are essential in managing one's responses and browsing life's various challenges. Sterne's wit subtly welcomes readers to review their own lives, the impacts they are subjected to, and how they might ensure they do not get 'burned up' too rapidly or needlessly.