by Margaret Ruth from Intent.com
The key points to remember when looking at the lines on the palm are that lines shift and change and that the quality of a line is one of the most important indicators of a line’s meaning. Some authors state that they view the lines as energy power lines or as rivers as a way of understanding how clear and strong a line is.
Life line
People get concerned about the life line because there is a notion that a short life line means a short life. But most palmists see the life line as an indicator of vitality, zest and well-being. The life line stands for the physical self and physical interaction with the environment. So, vitality and zest are related to a person’s interest in life, a life force or quality of life. It can indicate such things as life shifts, long illnesses and geographical movement.
The life line starts between the thumb and index finger and ends somewhere by the wrist. It is extremely rare to find someone without a life line. The left hand shows the inner experience/potential and/or heritage of the family of origin and the right hand shows the physical experience of the individual’s life. .

Interpreting the life line
Look at the quality of the line first; notice that some life lines change qualities in at different points.
Broad
Energetic physical nature
Thin
delicate, low energy
Deep
High life force
Shallow
Low life force or energy
Red
Excitable physical nature
Pale
Placid or passive nature
Check some of the other features; here are some interpretations.
Short: Ends around center of palm
May not have a challenging life path or enjoy vigorous effort
Long: Almost to wrist
Embracing challenges is part of the life path
Wide arc: Runs past hand center
Large life: travel, dislike routine, influenced by emotions
Narrow arc: Runs close to thumb
Closely held life: feelings to self, not adventurous, more defined or routine life
Series of straight lines
Changeable person or shifts in vitality or environment
Ends near the outside edge of the palm
Wanderlust, adventurer, appetite for change in environment