By the seed which was sown among the brambles is meant the man who hears the Message, but the cares of life and the glamour of wealth completely choke the Message, so that it gives no return.
But the cares of life, and the glamour of wealth, and cravings for many other things come in and completely choke the Message, so that it gives no return.
As for the woman who is really widowed and left quite alone, her hopes are fixed on God, and she devotes herself to prayers and supplications night and day.