Out of the mouth

"for out of the overflow of the heart, the mouth speaks."

does that mean that my heart is so full that
you only hear the few drips spilling over the rim of the cistern of my heart?
you will never taste the full swallows from the depths of my cistern.
you will miss the texture and nuance of my thoughts.
you will never be able to drink deep from the overflow of my heart.
you only get those few drips that creep over the edge of my humble cup.