occupation olympiodorus the elder
Proclus Lycaeus ( 8 February 412  17 April 485 AD ), called the Successor ( Greek , " Próklos ho Diádokhos "), was a Greek Neoplatonist ___MASK94___ , one of the last major Classical philosophers ( see Damascius ). He set forth one of the most elaborate and fully developed systems of Neoplatonism . He stands near the end of the classical development of philosophy , and was very influential on Western medieval philosophy ( Greek and Latin ). Alexandria ( or ; Arabic : '; '; "") is the second largest city and a ___MASK17___ economic centre in Egypt , extending about along the coast of the Mediterranean Sea in the north central part of the country . Its low elevation on the Nile delta makes it highly vulnerable to rising sea levels . Alexandria is Egypt ' s largest seaport , serving approximately 80 % of Egypt ' s imports and exports . It is an important industrial center because of its natural gas and oil pipelines from Suez . Alexandria is also an important tourist destination . Arabic (' or ' ) is a Central Semitic language that was first spoken in Iron Age northwestern Arabia and is now the " lingua franca " of the Arab world . Arabic also is a liturgical language of 1 . 7 billion Muslims . It is one of six ___MASK33___ languages of the United Nations . It is named after the Arabs , a term initially used to describe peoples living from Mesopotamia in the east to the Anti - Lebanon mountains in the west , and from northwestern Arabia to the Sinai in the south . Philosophy ( from Greek , " philosophia ", literally " love of wisdom ") is the study of ___MASK98___ and fundamental problems concerning matters such as existence , knowledge , values , reason , mind , and language . The term was probably coined by Pythagoras ( c . 570  c . 495 BC ). Philosophical methods include questioning , critical discussion , rational argument and systematic presentation . Classic philosophical questions include : Is it possible to know anything and to prove it ? What is most real ? However , philosophers might also pose more practical and concrete questions such as : Is there a best way to live ? Is it better to be just or unjust ( if one can get away with it )? Do humans have free will ? Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane , but commonly including varying amounts of other higher alkanes , and sometimes a small percentage of ___MASK50___ dioxide , nitrogen , hydrogen sulfide , or helium . It is formed when layers of decomposing plant and animal matter are exposed to intense heat and pressure under the surface of the Earth over millions of years . The energy that the plants originally obtained from the sun is stored in the form of chemical bonds in the gas . Damascius ( 458  after 538 ), known as " the last of the Neoplatonists ," was the last ___MASK44___ of the School of Athens . He was one of the pagan philosophers persecuted by Justinian in the early 6th century , and was forced for a time to seek refuge in the Persian court , before being allowed back into the Empire . His surviving works consist of three commentaries on the works of Plato , and a metaphysical text entitled " Difficulties and Solutions of First Principles ". The Nile ( " en - Nl ", " an - Nl " " P ( h ) iaro "; Ancient Egyptian : "  ' p " and " Iteru "; Biblical Hebrew :  , " Ha - Ye ' or ") is a ___MASK17___ north - flowing river in northeastern Africa . It is generally regarded as the longest river in the world , however other conflicting sources cite a 2007 study that gave the title to the Amazon River in South America . The Nile , which is 6 , 853 km ( 4 , 258 miles ) long , is an " international " river as its water resources are shared by eleven countries , namely , Tanzania , Uganda , Rwanda , Burundi , Congo - Kinshasa , Kenya , Ethiopia , Eritrea , South Sudan , Sudan and Egypt . In particular , the Nile is the primary water source of Egypt and Sudan . Olympiodorus the Elder ( Greek :  ) was a 5th - century neoplatonist who taught in Alexandria , in the late years of the Western Roman Empire . He is most famous for being the teacher of the important Neoplatonist Proclus ( 412 -- 485 ) , whom Olympiodorus wanted his own daughter to marry . He lectured on Aristotle with considerable success . Owing to the rapidity of his utterance and the difficulty of the subjects on which he treated , he was understood by very few . When his lectures were concluded , Proclus used to repeat the topics treated of in them for the benefit of those pupils who were slower in catching the meaning of their master . Olympiodorus had the reputation for being an eloquent man and a profound thinker . Nothing of his has come down to us in a written form .