▁mathematics , ▁astronom y , ▁logic , ▁and ▁r het or ic . ▁When ▁he ▁finally ▁acquired ▁a ▁career ▁as ▁a ▁cler ic , ▁he ▁took ▁an ▁active ▁part ▁in ▁the ▁the ological ▁controvers ies ▁between ▁the ▁Eastern ▁Orth odox ▁Church ▁and ▁the ▁Roman ▁Catholic ▁Church , ▁writing ▁treat ises ▁on ▁the ▁Process ion ▁of ▁the ▁Holy ▁Spirit , ▁advoc ating ▁the ▁western ▁usage . ▁He ▁was ▁the ▁t utor ▁of ▁the ▁learned ▁The odore ▁II ▁L ask aris ▁of ▁the ▁N ica e an ▁Empire , ▁and ▁a ▁great ▁collect or ▁of ▁classical ▁texts . ▁William ▁of ▁Rub ruck ▁reports ▁that ▁his ▁benef actor ▁John ▁III ▁Dou k as ▁V at atz es ▁owned ▁a ▁copy ▁of ▁the ▁missing ▁books ▁from ▁O vid ' s ▁Fast i . ▁▁ ▁B lem my des ▁also ▁founded ▁a ▁school ▁where ▁he ▁taught ▁students ▁such ▁as ▁Prince ▁The odore ▁II ▁L ask aris ▁and ▁George ▁Ak ropol ites . ▁In ▁his ▁later ▁years , ▁B lem my des ▁became ▁a ▁mon k ▁and ▁retired ▁to ▁a ▁monaster y ▁he ▁himself ▁built ▁in ▁E ph es us . ▁He ▁died ▁in ▁ 1 2 7 2 . ▁ ▁Bibli ography ▁Aut obi ograph ia ▁( C urr icul um ▁Vit æ ) ▁Ep ist ula ▁universal ior ▁Ep it ome ▁log ica ▁Ep it ome ▁phys ica ▁Ex pos it io ▁in ▁Ps al mos ▁De ▁process ione ▁Spirit us ▁San ct i ▁De ▁regia ▁pel lice ▁temp lo ▁e ject a ▁( On ▁the ▁Royal