We know He has reached out to us by the demonstrations He’s given when he did. For example the miracles He has worked in the past and in our current times. We can also reach the idea of His existence through philosophical reasoning although we can’t know anything more than that. And our human minds aren’t capable of understanding God’s entire mind, but He is able to understand ours, thus he can communicate with us and we with him.
who says the universe has the natural structure to allow a being outside of time, to enter time and what, whisper in the ear of someone hoping they dont misconstrued what is said? and how would god know whatever is said will remain correctly interpreted for centuries to come? that someone wont lie and twist the words, god would have to run every scenario in its “head”, except it cant do that because being outside of time means u cant change one moment to the other, and therefore cannot think
and do we try to change the natural order of lesser beings like ants? do we punish ants that kill other ants, do we enter their hills and try to make them aware of the complexity of our human lies? we just study them. there’s no need to fix whats naturally occurring, god would only reach out to us out of vanity, messing with the experiment only to get credit for its creation