I have heard it said many times in religious/spiritual and/or typical conversation that "there is more to know than that which is written [in the bible]." Is this comment scripturally inspired? If so where can the comment or its inspiration be found in scripture?
Try the very last verse of the book of John:
Beside that, it is obvious that much of the minutia of daily life is missing from the Bible.
From Orthodox catechism
2 John 1:12
2 Timothy 2:2
1 Corinthians 11:2
2 Thessalonians 2:15
In Holy Tradition of Orthodoxy the valid interpretation of the Scripture can be made only by Holy Spirit, through saints. Other than their interpretations, are just opinions. According to this approach, inside Orthodox church cannot exist 2 different confessions, both them valid, because Holy Spirit cannot separate or contradict Himself.
1 Corinthians 3:16
The Bible is a collection of books established inside Holy Tradition of the Orthodox church. These books where collected by the disciples of the apostles, transmitted to the disciples of the disciples, in so on, for almost 4 centuries. In this time a multitude of apocriphal writtings, came up, and recognition of the autentic books became a problem inside the church. The canon of the Bible were proposed to by the saint Athanasios the Great (+373), saint Gregory the Teologian (+389), saint Amphilochios (+403). Because only temples of the Holy Spirit could recognize which are the books inspirated by Holy Spirit, the holy fathers approved in ecumenic councils (Laodicea, Carthage) which books can be included in Holy Scripture. (http://symeon-anthony.info/BibleCanon/CanonicalBibleBooks.htm)
The Canon of the Holy Bible, was only one canon from a multitude of other canons. (http://theocacna.tripod.com/canonsaa.htm) Saint Atanasios the Great which proposed the canon of Holy Scripture most closed by the one accepted today wasn't an adept of "Sola Scriptura", because he wrote for the church another book called: "The life of Saint Anthony the Great", which was his spiritual father. And the canon 46 of council from Cathage states one of the practice of the apostolic church:
In Orthodox Tradition the life of the martyrs and the teachings of holy fathers of the egyptian desert or sinai are another precious tresures similar to the Bible. The Bible can be seen as the THEORY, and the life of the martyrs and desert fathers can be seen as the PRACTICE.
This tells me we really don't know anything and that there is much more than what is written.
I remember working with children with disabilities and thinking this is what it must be like for God working with us, saying to himself they can't see or understand all these things but I will help them.