Greetings! Here are my answers
""What is it about the “unknowable” …that has led you to “knowledge.?”
Do this, do you mean the being that Catholics call God? If that is the case, I think He is knowable to some degree (for example, certain attributes-omnipotence, omniscience, being all good) though not exactly completely understandable. I think He created me and the universe and is the source of being so and that since he is omniscient He can lead me to knowledge.
“Would you create a god if no one told you about the idea?”
I’m not sure if I would have. However, through natural law, people, by their own reason, can come to believe in a certain sort of God (that is, a being with the attributes listed above). I’m a convert to Catholicism from no religion and thought that man had been made God, but through study I now believe God made man.
“Would we worship a god…if there wasn’t punishment?”
I would. In fact, if my choice was between living eternally without pain, suffering, or death and with anything I wanted and seeing God’s face, I would choose seeing God’s face.
“Can we long for a heaven…when our happiest experiences are of this earth?..what is the context?”
Yes, I think we can. We long for the eternal and for meaning, which I think can only truly be found in God. I think we can long for heaven even though our happiest experiences are here on earth because what we have here are often foreshadowings of heaven. The love I feel towards my parents, wife, and friends will be even greater in heaven and our communion together and with God will be even more powerful.
Can we not be moral…without religion?
The question is difficult, because it depends on how we define morality. It also depends on what you mean by religion. In the end though, I would argue strongly that our ability to be moral is based upon God’s grace, so while we could be moral without religion, without God’s grace, it’s basically impossible to be moral.
I would also argue that a person will become more moral then they used to be if they open up to God. Many people, including atheists, are more moral than myself, but they would be even more moral than me if they came to Christ.
If you saw me on the street…would you know I was Catholic?..or not?
I would not know, one of my Japanese friends is an atheist but wears a cross out of fashion

. we’d have to talk first. I think also being a Catholic is a matter of belief, not a matter of morality. I’m a Catholic because I believe Catholicism is true, even though I’m a sinner.
WHAT IS THE RELEVANCE…
Religion makes truth claims and what is true is relevant.
Peace in Christ!
Frank