This painting is talking about human's wish to know the future and the unknown through mystical means.
The tasseographer doing future reading through tea/coffee but actually those are only the means to illuminate the knowledge/information projected to the soul.
Many times people lose self confidence and cling to external means for receiving information related to their own lives which may help them to get some peace of mind or assist in decision making.
The different external mystical methods can assist sometimes but the true and constant source of information is within us all if only we'll believe and listen.
If we'll just sit quality think/meditate or clear our mind in any other way, we'll see things much clearer and the information we're seeking will be revealed to us.