(Hebrew עשיה; also Asiyah or Olam Asiyah, the world of action) The fourth and lowest of the Four Worlds of the Kabbalah, corresponding to the physical world or physical body.
"The expression 'doing (heb. Asiyah)' applies to the body, which is in the world of Asiyah." - Zohar 10:3:351
"...everything, both good and bad, depends upon action." - Zohar
In the Biblical Book of the Revelation of St. John, this term is mistranslated as "Asia." It should say:
"John to the seven churches [energetic, psychological centers] which are in Assiah [the physical body]: Grace be unto you, and peace, from him which is, and which was, and which is to come; and from the seven Spirits which are before his throne." (Revelation 1:4)
"Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Assiah [the physical body]; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea." (Revelation 1:11)