A believer is not the one who will sit in a corner depressed or give up even before the battle starts. Our imaan gives us the confidence to look our enemy in the eye, no matter how big he is and say "Allah is with the patient!"
We are supposed to recognize our own gifts. We are supposed to discover our own talents, our skills, our strong points. And we are supposed to use these bounties of Allah in the service of His creation.
If there is one word which could describe the heart, it would be "change". How many times have we experienced our feelings, our emotions and our inclinations change. Our desires, our wishes, our passions, everything is in a continuous roller coaster of change.
When we decide to love Allah and obey Him, then Ikhlas is to stick to this decision, and obey Allah even if it is against our very own inclination. Even if it is against our inner feelings, against our own wishes.
Shaitan offers us is instant gratification, even if it is less. And what Allah offers us is infinite yet it is not for instant grabs. We have to wait to get it, sometimes wait until we die.