Your heart is like a brightly shining sun filled with the light of happiness. It is continually radiating rays of happiness flowing outward in all directions. All the while your mind is creating a blanket of thought waves that cover over your heart. At times the blanket is thread bare and at other times it is so thick and heavy none of the happiness can pass through at all.
Once you contemplate that experience is basically empty of anything other than thoughts you can let them go and watch them vanish along with the ending of that experience. Since the heart is then freed from fixating on old experience it is open to the natural flow of its own happiness. When the heart is happy all of the beautiful qualities of the mind can come forth. This is where a carefree and joyful attitude is found.
Spiritual Gravity 