Existence is the state of having being or reality in contrast to nonexistence and nonbeing. Existence is often contrasted with essence: the essence of an entity are its essential features or qualities, which can be understood even if one does not know whether the entity exists.

• Being and Time
  • be , am , is
  • was , were
  • will be
• being and motion
  • be
  • became
  • will become

• Ambiguous Consequential state of the body or thing which are maintained by
  • the real states which is either brain or an artificial source
    • VEGETATIVE STATE
    • Artificial States
  • the representative states which are either the mind or a spiritual source
    • MENTAL STATES
    • VIRTUAL OR SPIRITUAL STATE