What is first a thought or a feeling?

Your body usually responds to the environment with automatic feelings or instinct first - you might not even realize that you are having feelings, because that part of the brain is the one that is deepest inside and not really part of your consciousness. The limbic system is part of your body's reaction system which evolved to help you stay alive by responding to things around you (like danger or food). Sometimes you may realize that a certain situation or location makes you feel a certain way, and you don't know why you feel that - this is your reaction instinct working. For example, if you smell something that you really like to eat, you might suddenly feel hungry - then you will think, "Wow, that smells great; I'm hungry." Or, if you suddenly notice a large animal, you may jump back with your heart racing - afterwards, you think, "That was really scary!"