Your question, "could we use alchemy to make gold for Krishna's altar?" but—I could not follow what you mean by using alchemy for Krishna's altar, but if you can make Krishna's sitting place made of gold, either by alchemy or by purchasing gold, it will be a grand success. But I do not advise you take advantage of alchemy for making gold, it it is not certain. We should not waste our time on that which is not very sure. If you can manufacture gold, then we can very soon spread our Krishna Consciousness, but I think Krishna will not give us that opportunity, because as soon as we get large quantity of gold, we forget Krishna. That nature is incumbent in our character.
Yes, those twelve symptoms of the spiritual soul are correct, except for "all-knowing". All-knowing it cannot be, but full of knowledge.
The scientists' anti-matter is different from the anti-matter conception which I discussed in my book, Easy Journey to Other Planets. I think I have explained this by correspondence with Dr. Welk.
Regarding your questions, "how the simpler faith of a real Christian, that is not so advanced in knowledge of the Supreme Person, differs in ecstasy or the end result of God-consciousness," (1) and persons "a devotee who has experienced some ecstasy in the company of Christians suggests that if there be no quantitative or qualitative difference between the two forms of Kirtana, then the simpler philosophy of Christianity has the advantage, and that our philosophy is for the intelligent class of men, true, but of what advantage is such intelligence if the end is the same?" (2) There is no ecstasy in such simple faith; there cannot be any ecstasy. The Christian faith as it is now exhibited, they have simply a faint idea of God as order-supplier. Certainly God is the Origin, Source of all supplies, and either God-conscious persons or demons, everybody is enjoying the general supplies made by God. It is just like a rich father maintains all kinds of children; some of them may be a highly qualified, some of them are rascals. The father does not mind whether a child is rascal or qualified, but out of his love for all of them he supplies the essentials for the children.