David Hume believes that morality is an after-effect of reason. What this means is that morality is not reason based itself, and that morality is more of a corresponding feeling about actions that we understand with our reason. Therefore, Hume sees morality as after reason because the emotions or sentiments are what interpret any given moral action and reason is only what understands the given facts about a moral situation.
So, an example of that Hume uses is about drinking wine at a party. Hume believes that the presence of the wine is understood by reason, and that the individual’s choice to drink wine is prompted by a reaction to the understanding. This reaction is one that is based on sentiment, or emotion or passion. For Hume, if one chooses to drink wine it is because of the sentiment of feeling a certain way and not because of the fact that wine is available.

It’s difficult to agree with Hume that morality is only emotion based, because I think that the emotions are based in reason. There is also a big danger in Hume’s philosophy because if morality is an emotional impulse that is had after reason but not because of it, the n morality can be unreasonable. Also, there are relativistic threats in Hume’s philosophy, because it seems that morality is an emotive opinion.

I do not agree that the manner in which we judge a moral action is only emotion based, because one experiences approval or condemnation based on understanding of situational complexities. Our emotions are built on our capacity to reason, and I think that Hume ignores this aspect. If Hume is correct and morality is completely emotion based, then there is no absolute basis to judge a moral agent or its actions.