‘Isn't all perception and understanding relative?’ explores the connections between observation and perception. The philosopher Aenesidemus thought perception was always relative to the observer, the conditions under which the observation was made, and the state the object was in when it was perceived. By discussing relativism and perception, it is shown that objectivity is a feature of judgements that we make about the world, and judgements involve concepts and theories. To think otherwise is to assume that objectivity can be secured only in the absence of interpretation and judgement. However, bjectivity only becomes an issue when we raise the question of the standing of our judgements and interpretations.