Could you list for me your two most significant things about Jesus of Nazareth that you
learned outside of the Bible?
His existence as a Historical person and his crucifixition which is one of the two most important things that the story of the Gospels tell.
His crucifixition and his ressurection.
Polycarp mentions the ressurection
Polycarp 2:2
"Now He that raised Him from the dead will raise us also; if we
do His will and walk in His commandments and love the things which He
loved, abstaining from all unrighteousness, covetousness, love of
money, evil speaking, false witness; not rendering evil for evil or
railing for railing or blow for blow or cursing for cursing;"
I expect that you will not quote a church father as he himself quotes any part of the NT canonical books.
There were no NT canonical books in that time.They became 'books' much later since the original writings were lost/destroyed in the time when Christians were mostly persecuted.
By that line of tradition you , me and everyone else has the chance to read it and study it as such.
They gave their life so we can read and study it today.
That is called martyrdom.
Don't come back with a quotation from a church father which is him referring to something in the 27 New Testament books.
These books are defined as canonical in the 4 century and the earliest existing is the Codex Sinaticus.
They have never existed as Books before that.
Well , originally they existed as Biographies , but we son't have the original writings.
The only thing we have is how the stories were perserved and that is by line of tradition which means by passing it to the next generation.
Nothing as evidence has been found to suggest that they 'corrupted' the message within these 3 centuries.
Furthermore the Gospels were called Synoptic based on that analysis.
Because in literal translation 'Synoptic Gospels' means 'Good news that looked the same'.
They were called like that in the sense of Theology because the central Christian doctrine was not touched.
That is why we have footnotes in each translation of the Bible , so we might recognize the difference in words that changed meaning through time.
One word meant one thing in 1 century and meant another thing in second century.
That is because language evolves.