The first principle of Biblical interpretation is the life and teachings of Jesus. If as Christians we want to get the clearest idea of how Jesus expects his followers to live, then we look at how Jesus, the founder of Christianity, lived and related to others.
It's also through the life and teachings of Jesus that we get the most accurate picture of who God is, and what he expects from, not just those who believe in him/her, but from all people.
The best place to find the information we need to follow Jesus is in those books of the Bible that are reports of how he lived, that is the first four books of the New Testament; Matthew, Mark, Luke, and John.
And the most complete and concise expression of Christian beliefs in found in the Sermon on the Mount.
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