Ihsan is to worship Allah as if you can see Him. Because you understand although you cannot see Him, that He can see you." This is to motivate us to strive to do our best no matter what the situation is and not be lax in doing so.
Fasting is supposed to teach me to appreciate everything that I have been given and one of the most precious things that I've been given is the ability to choose. I choose to be selfish or to be selfless.