Original Sin?

“Do not then go beyond yourself to seek for evil, and imagine that there is an original nature of wickedness. Each of us, let us acknowledge it, is the first author of his own vice. [...] Here you are the master of your actions. Do not look for the guiding cause beyond yourself, but recognize that evil, rightly so called, has no other origin than our voluntary falls.”

St Basil the Great, Hexæmeron, Homily 2

To Injure the Gospel

Of the dogmas and messages preserved in the Church, some we possess from written teaching and others we receive from the tradition of the apostles, handed on to us in mystery. In respect to piety, both are of the same force. No one will contradict any of these, no one, at any rate, who is even moderately versed in matters ecclesiastical. Indeed, were we to try to reject unwritten customs as having no great authority, we would unwittingly injure the gospel in its vitals; or rather, we would reduce the Christian message to a mere term.

St Basil the Great, The Holy Spirit, 27:66