“It's not one of those pretty biblical mandates like love your neighbor as yourself. But hell is not a pretty doctrine, either. There are lots of unpretty doctrines in the Bible. Yet if God wrote the Bible, I have to abide by it whether I like it or not.”

Source: Clockwork Angel

"Trinity" article in The Encyclopedia of Religion (1987) Vol 15, Subsection : "Development of Trinitarian Doctrine".
Context: Exegetes and theologians today are in agreement that the Hebrew Bible does not contain a doctrine of the Trinity, even though it was customary in past dogmatic tracts on the Trinity to cite texts like Genesis 1:26, "Let us make humanity in our image, after our likeness" (see also Gn. 3:22, 11:7; Is. 6:23) as proof of plurality in God. Although the Hebrew Bible depicts God as the father of Israel and employs personifications of God such as Word (davar), Spirit (ruah), Wisdom (hokhmah), and Presence (shekhinah), it would go beyond the intention and spirit of the Old Testament to correlate these notions with later trinitarian doctrine. Further, exegetes and theologians agree that the New Testament also does not contain an explicit doctrine of the Trinity. God the Father is source of all that is (Pantokrator) and also the father of Jesus Christ; "Father" is not a title for the first person of the Trinity but a synonym for God. Early liturgical and creedal formulas speak of God as "Father of our Lord Jesus Christ"; praise is to be rendered to God through Christ (see opening greetings in Paul and deutero-Paul).

From a letter to his father, quoted in George MacDonald and His Wife (1924) by Greville MacDonald
Context: I firmly believe people have hitherto been a great deal too much taken up about doctrine and far too little about practice. The word doctrine, as used in the Bible, means teaching of duty, not theory. I preached a sermon about this. We are far too anxious to be definite and to have finished, well-polished, sharp-edged systems — forgetting that the more perfect a theory about the infinite, the surer it is to be wrong, the more impossible it is to be right.

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 528.

Patheos, Correspondence with a Creationist http://www.patheos.com/blogs/reasonadvocates/2017/06/06/correspondence-with-a-creationist/ (June 6, 2017)

Thomas De Witt Talmage (1832-1902), The Pathway of Life, New York: The Christian Herald, 1894 p 278.
The Pathway of Life, New York: The Christian Herald, 1894

Speech https://api.parliament.uk/historic-hansard/commons/1936/nov/12/debate-on-the-address#column_1105 in the House of Commons (12 November 1936)
The 1930s

Source: The Naked and the Dead