Trinity - christiansquoting.org.uk

What doth it profit thee to enter into deep discussions concerning the Holy Trinity, if thou lack humility, and be thus displeasing to the Trinity? For verily it is not deep words that make a man holy and upright; it is a good life which maketh a man dear to God. I had rather feel contrition than be skillful in the definition thereof. If thou knewest the whole Bible, and the sayings of all the philosophers, what should this profit thee without the love and grace of God? ... Thomas a Kempis (1380-1471), Of the Imitation of Christ

The doctrine of the blessed Trinity is a reminder of the supernaturalness of biblical Christianity. The doctrine defies rationalization, yet it provides for the believer the answer to the unity and diversity of the world.... Robert P. Lightner (1931- )

Every once in a while in my discussions someone asks how I can believe in the Trinity. My answer is always the same. I would still be an agnostic if there was no Trinity, because there would be no answers. Without the high order of personal unity and diversity as given in the Trinity, THERE ARE NO ANSWERS.
F A Schaeffer He Is There And He Is Not Silent

We must appreciate that our Christian forefathers understood this very well in A.D. 325, when they stressed the three Persons in the Trinity, as the Bible had clearly set this forth. Let us notice that it is not that they invented the Trinity in order to give an answer to the philosophical questions which the Greeks of that time understood. It is quite the contrary. The unity and diversity problem was there, and the Christians realised that in the Trinity, as it had been taught in the Bible, they had an answer that no one else had. They did not invent the Trinity to meet the need; the Trinity was already there and it MET the need. They realised that in the Trinity we have what all these people are arguing about and defining but for which they have no answer.
Let us notice again that this is not the BEST answer; it is the ONLY answer. Nobody else, no philosophy, has ever given us an answer for unity and diversity. So when people ask whether we are embarrassed intellectually by the Trinity, I always switch it over into their own terminology -- unity and diversity. Every philosophy has this problem, and no philosophy has an answer. Christianity does have an answer in the existence of the Trinity. The only answer to what exists is that He, the triune God, is there. F A Schaeffer He Is There And He Is Not Silent

We need the full biblical content concerning God: that He is the infinite-personal God, and the triune God. Now let me express this in a couple of other ways. One way to say it is that without the infinite-personal God, the God of personal unity and diversity, there is no answer to the existence of what exists. We can say it in another way, however, and that is that the infinite-personal God, the God who is Trinity, has spoken. He is there, and He is not silent. There is no use having a silent God. We would not know anything about Him. He has spoken and told us what He is and that He existed before all else, and so we have the answer to the existence of what is.
He is not silent. The reason we have the answer is because the infinite-personal God, the full Trinitarian God, has not been silent. He has told us who He is. Couch your concept of inspiration and revelation in these terms, and you will see how it cuts down into the warp and woof of modern thinking. HE IS NOT SILENT. That is the reason we know. It is because He has spoken. What has He told us? Has He told us only about other things? No, He has told us truth about Himself -- and because He has told us truth about Himself -- that He is the infinite-personal, triune God -- we have the answer to existence. Or we may put it this way: at the point of metaphysics -- of Being, of existence -- general and special revelation speak with one voice. All these ways of saying it are really expressing the same thing from slightly different viewpoints.
In conclusion, man, beginning with himself, can define the philosophical problem of existence, but he cannot generate from himself the answer to the problem. The answer to the problem of existence is that the infinite-personal, triune God is there, and that the infinite-personal, triune God is not silent.
F A Schaeffer He Is There And He Is Not Silent

[He was] a solemn, unsmiling, sanctimonious old iceberg who looked like he was waiting for a vacancy in the Trinity. -- Mark Twain

Tell me how it is that in this room there are three candles and but one light; and I will explain to you the mode of the divine existence. John Wesley

Q. 9. How many persons are there in the Godhead?
A. There be three persons in the Godhead, the Father, the Son, and the Holy Ghost; and these three are one true, eternal God, the same in substance, equal in power and glory; although distinguished by their personal properties. WESTMINSTER LARGER CATECHISM #9