In this extract from The Down Grade Controversy, Charles Spurgeon highlights the danger of both theological and practical Arianism. The former denies the theological principles of Christ as fully God and fully man and the latter denies Christ by an air of cold detachment from the truth.
In most cases, in both preachers and hearers, it was only a short step down from the Arianism which makes the eternal Son of God a super-angelic being to the Socinianism (miscalled Unitarianism) which makes him a man only, denying alike original sin, human depravity, the mediation of Christ, the personality and work of the eternal Spirit, and that new birth without which divine truth has declared no one can see the kingdom of God. The descent of some few was less gradual, but more commonly, when once on “the down grade” their progress was slow, though unhappily sure. The central truth of Calvinism, as of the Gospel, is the person and work and offices of the Lord Jesus Christ. We love to use this Pauline and inspired description of our divine Savior and royal Master, and so to “give unto the Lord the glory due unto his name.” When men begin to hesitate about, and hold back the truth in relation to him, it is a sign of an unhealthy state of soul; and when these truths are diluted, omitted, or otherwise tampered with, it is a sign which in plain words means “Beware.”
The remark of a writer of reliable ability in reference to these times is worthy of quotation:—
“The deficiency of evangelical principles in some, and the coldness with which they came from the lips of others, seem to have prepared the way for the relinquishment of them, and for the introduction, first of Arminianism, and then of Arianism.”