From the National Catholic Register, Cardinal Gerhard Müller, Prefect of the Congregation for the Doctrine of the Faith from 2012-2017, has given us a Manifesto of the Faith, “Let Not Your Heart be Troubled.” My emphasis:
“In the face of growing confusion about the doctrine of the Faith, many bishops, priests, religious and lay people of the Catholic Church have requested that I make a public testimony about the truth of revelation. It is the shepherds' very own task to guide those entrusted to them on the path of salvation. This can only succeed if they know this way and follow it themselves...”
Go read it yourself. Its only four pages: short and easy read, easy to understand. In a nutshell, as it were.