You can see tell a calm and confident person by the absence of these things. Their hands are steady. You can gain insight into the kind of work a person does by their hands. A person who does physical and strenuous labor has hands that have callouses. They are rough and have become so to defend them against the constant stress their hands are put through.
Some people are rough in their touch, others are tender.
This is the opposite of someone who has stone hands. You throw the ball to the one with stone hands and they will drop the ball. You throw the ball to one with soft hands and they seem to welcome the ball like you would an egg during the egg toss at a family picnic. I suspect I have you wondering where in the world I am going with this. But I need to give you an image you can relate to this morning.