A sweet heart is not one that can be tasted as sweet, rather it is a heart that resonates at the same high frequency as natural sugars, such as caramel or cane sugar. It also is a heart that looks as clean as the heart of God.
When you arrive at the place at which the desires of your heart are as pure as the desires that are of the heart of God, you heart will look like the heart of God. That is the point at which all the desires of your heart will be instantaneously fulfilled.
The Lord God Almighty El Shaddai