The head line indicates not only the possible physical
effects on the head and shoulders but what goes on inside the head, it's way
of function and the most probable area of focus such as career. It is a very
significant factor in a palm reading as our process of thinking shapes every
decision we make, thereby choosing and affecting every possible future.
For example :
A straight line shows they are highly motivated and can stick to the goal. If it is sloping then not enough thought and too much imagination equals lazy or inactive thinking.