When a person is worried, they do have a tendency to hang their head low.
In Matthew 26:37, we see that even Jesus was troubled facing the death on the cross.” And he took with him Peter and the two sons of Zebedee, and began to be sorrowful and very heavy.”
When we are extremely sad or worried, we are said to have a heavy heart. We are also warned about too much worry.
We are told to take no thought for what we are to say, that God will fill our ears and mouth with what we are to say. We are also taught that we should live one day at a time and not worry about tomorrow. Someone who says nice things to others makes them have a glad heart.
Under Gods command 