"I thank you, living and enduring King, that You have mercifully returned me my soul; great is your steadfastness."
I find it funny that Modeh Ani is recited immediately after waking up in the morning. For most of us, that is the one moment of the day when we'd actually prefer being dead to being awake!
Perhaps that is exactly why we say it. If we manage to see Divine purpose in our lives even when the alarm goes off at 6:30 AM, then surely we'll be much more motivated the rest of the day, once we've had some coffee and life does not feel so terrible anymore.