sentences:  Plotinus considered infinity, while he was alive, during the 3rd century A.D.
  
  Simplicius, alive circa 490 to 560 AD, thought the concept "Mind" was infinite.Augustine thought infinity to be "incomprehensible for the human mind".The Jain upanga āgama Surya Prajnapti (c. 400 BC) classifies all numbers into three sets