It is the right and duty of each Christian to read and interpret the Scriptures for their own understanding and edification using reason, tradition, and the Holy Spirit as guides. Furthermore, standing on the shoulders of Christians before us we can learn principles that make the text clearer and consistent.
For instance, we must beware of interpreting any portion of Scripture in a way that conflicts with the general teaching of Scripture elsewhere. The New Testament must be approached as a whole. It is a complete and entire revelation given by God.
And when we approach parables we should avoid drawing any negative conclusions from the teaching of a parable. Parables teach ONE lesson primarily. The purpose of a parable is to present us one great positive truth.