An old definition of concentration is:
![](/fe/media/image/90/9089d0c557032ac027d65d53f1fa2da9e3da521f.jpeg)
Concentration is that flow of consciousness, which does not even touch anything outside consciousness. In it there is a perpetual contact with the 'self' and no contact with the ‘other'.
Therefore, it can be said to be the offspring of consciousness.To be self-absorbed is concentration.The soul is 'self' and all the rest is 'other'.