Evangelii Gaudium. Read the entire essay here.
Here is a taste:
2. “Evangelii Gaudium” distinguishes between the “primary” and “secondary” aspects of church teaching.
The evangelical understanding of the Christian faith focuses on the
atoning work of Christ on the cross above all other doctrines. Think,
for example, of Billy Graham — the closest thing evangelicals have to a
saint. Graham probably has his convictions about particular church
doctrines, but his ministry tended to play down these distinctions in
favor of a gospel message that transcended differences. In the same way,
Francis challenges his church to make evangelism — the proclamation of
the message that God and God alone has saved us from the consequences of
sin — a priority over those “second aspects” of faith, which are
important but do not “convey the heart of Christ’s message.”