Reason

Our ability to reason is what separates us from the animals. Animals function on instinct, which is built in by God.  On the other hand, we can think through daily situations.  The wonderment we experience takes us deeper into the thought of creation and interacting with those around us. Reason can also be detrimental to our healthy being when it is interrupted by mental illness or drugs.  We probably have all taken this ability for granted because it's there; it's part of our process like your heart beating.  

Take a moment to thank God for your reasoning ability.