Feelings. It is a weird thing I'd say, as, it makes you go through a weird phase.
Sometimes, it makes you believe that you're happy and sometimes makes you believe that you are sad. It makes you experience different things. Joy,happiness,sadness and what not. At times it makes you go through the most confused yet beautiful feeling-- Love.
Love is a good kind of feeling. But sometimes it shatters you. It destroys you. I'm not saying all the time, but ever so often,love makes you go through a hell lot of emotional rollercoasters be it good or bad.
For example, it makes you go through Jealousy. It has two effects---bad and good. Too much jealously leads to suspicion. And later, it results in a fall out. This further results in depression and sadness. Feelings make you feel something different. Yeah that's what it does.
So, I'm not implying that feelings are bad all the time but just try to control them sometimes or it'll lead you to your own destruction.