When the heart is engaged
When your heart is engaged, everything in life seems easy/easier. Things don't seem overwhelmingly heavy, dark or difficult. You "know" (in your heart of hearts) that you can do "it" (bravery and confidence (both heart energies) abound). You are the "Little Engine that Could!".
It's not your mind that is motivated, but it is rather being driven by the heart. The phrase, "You can do anything, if you put your mind to it" is only partly accurate. I can only really do it if you put your Heart into it as well. It is only when you are wholeheartedly committed to something that you are able to be truly persistent and face repeated failure(s)/rejection(s) (which appears "stupid" when evaluated from a purely Mind-only perspective).
When the heart is disengaged or simply not engaged, nothing seems to matter. You will seem to exude a sense of emptiness, listlessness perhaps even futility and hopelessness. It's the old adage: "Find something to live/love for." Is it surprising that "love" and "live" differ only by one vowel? Perhaps it isn't a coincidence! :)
How do I engage and harness my heart engine/energy?
Do stuff. Don't engage the mind but only the body. You may surprise yourself that once you put yourself, your body in motion, things start to happen. The universe respects motion, especially mindful, thoughtful motion (though willy-nilly motion is OK too... it can sometimes help lighten your heart. especially if you videotape it and post it on YouTube! ;) It's only when your mind engages the youtube post later that you experience shame, and foolishness or other forms of self-doubt). Make a point of carefully disengaging/unhinging your mind once in a while! :)
Random acts of kindness, silliness and motion/emotion. I know it's not very manly, but screw it... hug your little kid when he goes off to school and don't just shake his hand, even if you ARE the Prime Minister, Darn it!
...
