Life is the amount of health/hitpoints that a player character has. Each time a player receives damage, that amount may go through some transformation based on skills, gear, stats, or resistances before it is then subtracted from their hitpoints. When it reaches zero, the player dies. The player's life is represented by a red orb at the bottom left corner of the UI.
Life can be recovered with potions of healing, speaking to a healing NPC, or with the Life Stealing weapon modifier. Life can also be replenished by the use of Healing Potions and Rejuvenation Potions. Healing potions heal over time while Rejuvenation potions act instantly.
The amount of maximum life can be affected by items with life bonuses, or Stat Points invested in Vitality. Maximum life can also be increased by certain class skills or auras such as the Druid's Oak Sage.