If you cannot "reach" someone because of certain psychological "blocks," wouldn't that indicate you need to get into their head more, rather than just use pure reason? And if people are just more receptive at certain times, doesn't that imply knowing it well enough to see when that is? (and unfortunately, they may not be posting at the time) Messy as it may be, you gotta know people and be good at it. Of course the difference between this and the JW concept is this is individualized, the "spiritual food" of the WTS is only specific to the group - which isn't very specific at all.