Prima scriptura is the Christian doctrine that canonized scripture is "first" or "above all" other sources of divine revelation. Implicitly, this view acknowledges that, besides canonical scripture, there are other guides for what a believer should believe and how he should live, such as the created order, traditions, charismatic gifts, mystical insight, angelic visitations, conscience, common sense, the views of experts, the spirit of the times or something else. Prima scriptura suggests that ways of knowing or understanding God and his will that do not originate from canonized scripture are perhaps helpful in interpreting that scripture, but testable by the canon and correctable by it, if they seem to contradict the scriptures.
Prima scriptura is sometimes contrasted to sola scriptura, which literally translates "by the scripture alone". The former doctrine as understood by many Protestants—particularly Evangelicals—is that the Scriptures are the sole infallible rule of faith and practice, but that the Scriptures' meaning can be mediated through many kinds of secondary authority, such as the ordinary teaching offices of the Church, antiquity, the councils of the Christian Church, reason, and experience.
However, sola scriptura rejects any original infallible authority other than the Bible. In this view, all secondary authority is derived from the authority of the Scriptures and is therefore subject to reform when compared to the teaching of the Bible. Church councils, preachers, Bible commentators, private revelation, or even a message allegedly from an angel or an apostle are not an original authority alongside the Bible in the sola scriptura approach.
The Dogmatic Constitution on Divine Revelation is clear on the total equality of Scripture with Sacred Tradition when it says that "both Sacred Tradition and Sacred Scripture are to be accepted and venerated with the same sense of loyalty and reverence" because together they "form one sacred deposit of the word of God, committed to the Church." So, in one sense, Scripture has no primacy over Tradition, but an ancient tradition holds that the word of God, though equally authoritative in whichever form it comes, comes primarily in the form of Sacred Scripture, and thus we should seek for Sacred Doctrine primarily in the Scriptures. As Thomas Aquinas said: