It takes progressively more and more experience points in order to reach the next level. This value indicates how healthy you are. When it reaches 0, you are dead. The value on the left is your current health status, the value on the right is your maximum health. Your health value can go down for a variety of reasons, but the most common one is being hit by something sharp.
Magic energy is necessary to perform certain skills and magical spells.
As with health the value on the left is your current magical energy, and the value on the right the maximum amount. The physical strength of your character depends on this value. The higher it is, the stronger your character is. How accurate and how handy you are, is determined by your dexterity value. A high dexterity value is necessary for people who prefer precision over power, and is therefore an important attribute for archers.