Thank you for this thread, John; I find it quite interesting.
I haven't seen it mentioned here yet that there are two kinds of beliefs. For lack of better terms, I'll call them "head beliefs" and "heart beliefs". The former are those beliefs that have been formed because we have become intellectually convinced that something is true; these beliefs are entirely human in nature. And the latter are beliefs that only God can impart, written on the fleshy tablets of our hearts (2 Corinthians 3:3). These are things that we *know* but may have some difficulty articulating how or why we know.
Head beliefs can be quite dangerous. Religious convictions, for example, fall into this category, and they can lead to fanaticism, because religion as man understands it consists entirely of beliefs in the mind. Contrast this with God's concept of religion in James 1:27. Other examples of head beliefs include philosophies and political ideologies. Those with head beliefs may tend to treat others who do not believe as they do with not only criticism but also derision, ridicule, and even violence.
By contrast, those with heart beliefs wish ill of no one. They have no need for others to believe as they do (though they may feel sad when this happens), and they remain free to love others as themselves, generally as a way of living out these self-same beliefs.
It is true that our hearts are deceitful, but note that God himself examines both our minds and our hearts (in the very next verse); we can entrust our hearts to him (Jeremiah 17:9-10).
For cases where God asks us for heart beliefs (which, again, only he can impart), see Mark 11:23 and the famous Romans 10:9-10. Note especially in the latter that believing one is saved in one's mind is not sufficient; one must believe it in the heart, and that belief can only come through the holy spirit.
It appears as if this thread thus far has focused exclusively on head beliefs. I would submit that these are not useful at all when talking about matters of God. I have little interest in what man has to say about God when speaking of his own head beliefs. There is no life in these beliefs. However, I am quite eager to hear what man has to say about what God has put in his heart. This is why it is written, "The testimony of Jesus is the spirit of prophecy" (Revelation 19:10). Such a man's words carry, and are carried by, the holy spirit, and there is Truth and Life in them.
So, to answer the question from the OP, no I did not choose my beliefs; not at all. They were written on my heart by the finger of God through his spirit, and I could no more change them than I could deny them. Any beliefs I may have in my mind are inconsequential in light of his truth.
In Christ,
Daryl