Emotions are everywhere in our lives, which have many forms of expression and different meanings. I really interested in The James-Lange theory that represents that the emotions are essentially physical in nature and bodily changes come before, and cause, emotional changes. With the example of an exam situation, I just can clearly understand that if I remove the physical symptoms the corresponding emotions disappears. Likewise, this theory also includes that

If you mimic the appropriate physical symptoms you can generate the corresponding emotion. For example, if you smile you will feel happy.

I like this passage because I always have same experience just like that, like when I talk to someone who is feeling depressed, I just unconsciously mimic some of the physical expression of his mood. So I summarize that this is a mechanism through which we can come to know and empathize with other people’s feelings.

When we regard emotions as an obstacle to knowledge, we just can find out that emotions always influence our rationalizations.

When we are in the grip of strong emotions, we tend not to reason in an objective way but to rationalize our pre-existing prejudices.

Indeed, if we have a particular emotional attitude about something, we may manufacture bad reasons in order to justify it. At the same time, turbulent emotions can distort our ability to think clearly and behave intelligently. Moreover, we also regard emotions as a source of knowledge. There is the relation between reason and emotion. We can say reason and emotion are two completely different things, but also can say the two are mutually reinforcing.  Whatever it is, there is a more-or-less continuum of mental activity running from the very rational to very emotional. Despite emotions value, intuition do not have any magical authority and cannot always be trusted. So it is worth keeping in mind that having strong convictions about something does not in itself guarantee that it is true.