Ras I Tom, I and I are individuals still and my answers are not blanket statements, what works for I is I experience, I cannot speak for every body, but I will give my opinions and the I can tell me if it's helpful or not.
Is the I saying that we cannot depend solely on the external human example?
The hammer doesn't pound the nail all by itself, we are given the tools, taught how to use them, but it is up to I and I to work.
Does the I think that we can fully depend on the human example at all?
We are humans, so what can we do but manifest the human example. The example is the Haile Selassie I, He is all that We as humans could ever be, what else could we fully depend on but our fullest potential.
Or is the human example solely a means of inspiration, as is Holy Water the external inspiration which leads to the manifestation of the faith which results in the healing?
The example is an inspiration to some, to others it is something that they cannot bear but to give their life's work unto its manifestation. As for the water, the inspiration may just be providing enough strength for that instance, it is their faith in a temporary item that makes the strength useful only for a time.
Can inspiration sustain us? Do you think that external inspiration gives enough spiritual food to sustain the spirit?
Inspiration is not the sustainer, whatever One gets from it must be manifested in order to sustain One's Irits. I don't look at His Majesty's picture on the wall, pray to it and imagine that He will physically come and save me because I have faith in H.I.M.. My own sense is that One must have total faith that His Majesty's example is perfect, and total faith that they will do their very best to tirelessly strive to manifest the example within, and faith that they are capable. If One doesn't trust themSelf I don't know how they will progress.
Shouldn't we look to the source of all sources? Shouldn't we look first to Jah, then to external inspiration?
I'm not saying we shouldn't, but many find this very difficult. The way society is today I think the vast majority find themSelves to be conditioned to look out rather than in (initially that is), I think this has gone on for a very long time and I don't know of an example where any society or culture has immediately taught a complete reliance on the inner Self. We a privileged to have the benefit to look to our ancestors and ancients for the wisdom and strength they allow us to tap into. I owe my entirety to the blessing bestowed upon I by His Majesty Haile Selassie I.
If we look first for inspiration through external examples that Jah privdes, then what happens if these external inspirations are no longer available?
His Majesty is eternal, I'm not sure that I overs...