"Gather experience... Look at what you should not look at. A feeling of anxiety is the sure and certain evidence that you should do this"

Clive Barker's quote, "Gather experience ... Look at what you must not look at. A feeling of anxiety is the sure and particular proof that you ought to do this", can be interpreted as an interesting call to embrace pain as a pathway to personal development. This perspective is especially relevant in a society that typically focuses on convenience and routine over the unknown and possibly disturbing.

The opening expression, "Gather experience", recommends an active pursuit of life's offerings, motivating individuals not to stay passive but to seek out diverse experiences. This pursuit is rooted in the belief that each encounter, whether positive or negative, adds to a person's knowledge and understanding of the world.

The following area, "Look at what you ought to not look at", challenges cultural standards and individual fears. It suggests that individuals frequently avoid facing the taboo, the unfamiliar, or the distressing, usually out of worry or social pressure. Barker is urging the reader to question these restrictions, suggesting that real insight and development come from checking out these uncharted areas.

The final part of the quote ties this expedition to the sensation of anxiety: "A feeling of anxiety is the sure and specific evidence that you should do this". Anxiety, usually seen in a negative light, is reframed here as an assisting signal instead of a deterrent. It suggests that the really existence of worry or pain suggests the capacity for growth and knowledge. This redefinition positions anxiety not as a barrier, but as an indicator of an upcoming challenge that is both important and needed.

In sum, Barker's statement is an extensive invite to step outside of comfort zones. It recommends personal advancement lies in dealing with worries and engaging with the unidentified, reframing stress and anxiety as an essential, albeit unpleasant, part of the journey towards self-discovery and experiential richness.