The Stoics Believe That Only Physical Body Exists

An impression would be the way things seem to be to you. The epicureans express total confidence in such sensory experiences. They think that all sensations are true, even if we put the wrong interpretation on them. The stoics are more sceptical and say some impressions are true but others false. A cognitive impression is rock solid and can serve as the basis for knowledge. We achieve knowledge when we combine together many rational impressions into a global understanding of the world.