Papal infallibility
Evangelical churches do not believe in papal infallibility for reasons similar to those of Methodist and Reformed Christians. Evangelicals believe that the Bible alone is infallible or inerrant. Most evangelical churches and ministries have statements of doctrine that explicitly say that the Bible, composed of the Hebrew Scriptures and the New Testament, is the sole rule for faith and practice. Most of these statements, however, are articles of faith that evangelicals affirm in a positive way, and contain no reference to the papacy or other beliefs that are not part of evangelical doctrine.
Accommodation (religion)
Thus preaching the Gospel is of prime concern to evangelical Christians, for it is "The power of God for the salvation of everyone who believes" (Romans 1:16). It explains also why many evangelical Christians view the Bible so highly – for to remove "sola scriptura" is to essentially remove everything we can know about God. It explains why the New Testament was written, and why churches need people to teach and build up the body of Christ. It also explains why evangelism and missionary activity was and is necessary – both by the Apostles and by the church today.