I am going to be blunt.
You are not the arbiter of Christian doctrine.
You don't get to decide the tenets of Christianity.
You don't have permission to reverse or negate Christian teaching.
You don't have the authority to define Christianity.
Neither do I.
If you are a Catholic, you don't get to pick and choose which parts of the moral law and the Creed are valid. If you are a Protestant, you don't get to personally interpret the Bible and tell us what you are sure Christ meant. If you are a secularist, you don't get remake Jesus in your own image, i.e., a New Agey, non-threatening guru who fits neatly into your own worldview.
Trust me, it's nothing personal.
You just simply don't have that option.
You didn't establish Christianity, and you have no permission to reinvent it.
You see, Christianity is a revealed religion.
It was given. It is handed down.
It is not open to anyone's personal interpretation, whether one's name is Arius, Nestorius, Luther, Kennedy, Pelosi, Chittister, or Miller.
You can choose to accept the whole of Christianity and her teachings, or you are free to reject them. You are even free to start your own religion, teaching whatever you'd prefer.
But you do not have the right to speak in the name of Christ's Church and define authentic Christian belief for yourself or others.
You do not have that right, because you do not have that authority.
Revelation ended with the death of the last Apostle (St. John) and the entire Deposit of Faith has been handed down intact by the only men to whom Christ delegated His authority: The Apostles and their successors, also known as the pope and the body of bishops. This teaching authority, or Magisterium, is not you, and it's definitely not me.
The Magisterium, guided by the Holy Spirit, protects the Deposit of Faith from any deviation, addition, subtraction, reversal, contradiction, distortion, or destruction offered by those who wish Church teaching to be something it is not.
So, as earnest as you are, as sincere as you are, as studious as you are, as kind as you are, even as holy as you are, you are not allowed in any way to alter, bypass, morph, undermine, negate, or redefine Christian teaching on faith or morals and still insist that it's Christian.
You may receive the Faith, you may accept the Faith, and you may hand down the Faith pure and entire, but you may not be its arbiter.
Sorry, you're just plain not allowed to do that.
Related post: Authority
For emphasis, and for the sheer joy and peace that faithful Catholics feel when the millennia melt away as we read the Early Fathers, I give you St. Irenaeus, Bishop of Lyons, extolling in 189 A.D. the selfsame faith we hold today. He writes of what Christians everywhere already knew… but which the heretics could not accept:
"It is possible, then, for everyone in every church, who may wish to know the truth, to contemplate the tradition of the apostles which has been made known to us throughout the whole world. And we are in a position to enumerate those who were instituted bishops by the apostles and their successors down to our own times, men who neither knew nor taught anything like what these heretics rave about" (Against Heresies 3:3:1 [A.D. 189]).
"But since it would be too long to enumerate in such a volume as this the successions of all the churches, we shall confound all those who, in whatever manner, whether through self-satisfaction or vainglory, or through blindness and wicked opinion, assemble other than where it is proper, by pointing out here the successions of the bishops of the greatest and most ancient church known to all, founded and organized at Rome by the two most glorious apostles, Peter and Paul—that church which has the tradition and the faith with which comes down to us after having been announced to men by the apostles. For with this Church, because of its superior origin, all churches must agree, that is, all the faithful in the whole world. And it is in her that the faithful everywhere have maintained the apostolic tradition" (ibid., 3:3:2).
"Polycarp also was not only instructed by apostles, and conversed with many who had seen Christ, but was also, by apostles in Asia, appointed bishop of the church in Smyrna, whom I also saw in my early youth, for he tarried [on earth] a very long time, and, when a very old man, gloriously and most nobly suffering martyrdom, departed this life, having always taught the things which he had learned from the apostles, and which the Church has handed down, and which alone are true. To these things all the Asiatic churches testify, as do also those men who have succeeded Polycarp down to the present time" (ibid., 3:3:4).
"Since therefore we have such proofs, it is not necessary to seek the truth among others which it is easy to obtain from the Church; since the apostles, like a rich man [depositing his money] in a bank, lodged in her hands most copiously all things pertaining to the truth, so that every man, whosoever will, can draw from her the water of life. . . . For how stands the case? Suppose there arise a dispute relative to some important question among us, should we not have recourse to the most ancient churches with which the apostles held constant conversation, and learn from them what is certain and clear in regard to the present question?" (ibid., 3:4:1).
"[I]t is incumbent to obey the presbyters who are in the Church—those who, as I have shown, possess the succession from the apostles; those who, together with the succession of the episcopate, have received the infallible charism of truth, according to the good pleasure of the Father. But [it is also incumbent] to hold in suspicion others who depart from the primitive succession, and assemble themselves together in any place whatsoever, either as heretics of perverse minds, or as schismatics puffed up and self-pleasing, or again as hypocrites, acting thus for the sake of lucre and vainglory. For all these have fallen from the truth" (ibid., 4:26:2).
"The true knowledge is the doctrine of the apostles, and the ancient organization of the Church throughout the whole world, and the manifestation of the body of Christ according to the succession of bishops, by which succession the bishops have handed down the Church which is found everywhere" (ibid., 4:33:8).
For more Fathers on Church authority and apostolic succession, go here.