By entertaining of strange persons, men sometimes entertain angels unawares; but by entertaining of strange doctrines, many have entertained devils unaware.
— John Flavel
Doctrine
It is an undoubted truth that every doctrine that comes from God, leads to God; and that which doth not tend to promote holiness is not of God.
— George Whitefield
Doctrine
If we do not make clear by word and by practice our position for truth and against false doctrine we are building a wall between the next generation and the gospel.
— Francis Schaeffer