Tesla’s coded message from the past.

When reading Tesla’s writings we notice that he was very precise, systematic and practical up to about 1895, the year his laboratory burned down. From that moment onward Tesla develops a strange style culminating in his “the Problem of Increasing Human Energy” of June 1900.
When taken literally this article is very odd, hardly practical and has little to do with Tesla’s work as we know it. This is the first trigger to assume there may be a hidden message here.
The second trigger is found in communications with his close friend Robert Underwood Johnson, in which they both speak in analogies instead of direct language.

I want to present a few snippets here that I think show that Tesla’s work should not always be interpreted in a strictly literal way.

Method 1: a misleading vague intro followed by the actual message
March 5th, 1904:

It is impossible to resist your courteous request extended on an occasion of such moment in the life of your journal. Your letter has vivified the memory of our beginning friendship, of the first imperfect attempts and undeserved successes, of kindnesses and misunderstandings. It has brought painfully to my mind the greatness of early expectations, the quick flight of time, and alas! the smallness of realizations. The following lines which, but for your initiative, might not have been given to the world for a long time yet, are an offering in the friendly spirit of old, and my best wishes for your future success accompany them.

Now note how the time difference is stressed:
“for a long time”, “spirit” (= non-material remains), “of old”, “your future success”
Now forget about the paragraph and just read the last line. What do you read?

June, 1900:

Again, it is contended by some that the advent of the flying-machine must bring on universal peace. This, too, I believe to be an entirely erroneous view. The flying-machine is certainly coming, and very soon, but the conditions will remain the same as before. In fact, I see no reason why a ruling power, like Great Britain, might not govern the air as well as the sea. Without wishing to put myself on record as a prophet, I do not hesitate to say that the next years will see the establishment of an "air-power," and its centre may be not far from New York.

One year before the start of his Wardenclyffe project (drawing power from our atmosphere, the air) on Long Island NY…

Method 2: Analogies

June, 1900:

Lord Kelvin, in his profound meditations, allows us only a short span of life, something like six million years, after which time the sun's bright light will have ceased to shine, and its life giving heat will have ebbed away, and our own earth will be a lump of ice, hurrying on through the eternal night. But do not let us despair. There will still be left upon it a glimmering spark of life, and there will be a chance to kindle a new fire on some distant star.

Introduction to his article. Tesla knew that he might not live to see his Magnum Opus come to fruition, but his work and this article in particular could kindle a new fire in some future star (=scientist).

June, 1900:

To increase materially the productivity of the soil, it must be more effectively fertilized by artificial means. ---//--- The chief and most valuable among these substances are compounds of nitrogen, and the cheap production of these is, therefore, the key for the solution of the all-important food problem. Our atmosphere contains an inexhaustible amount of nitrogen, and could we but oxidise it and produce these compounds, an incalculable benefit for mankind would follow.

What benefits for mankind are we looking for? Just look at the name of this article: “the Problem of Increasing Human Energy”. The source of our energy is to be found in our atmosphere. It is present in an 'inert' form, but it can be activated... Once activated we can 'fertilize' our Earth with it so that industries (plants) can grow. This is a beautiful analogy of his Wardenclyffe project. The food-energy analogy is given later on in this article.

June, 1900:

I calculated that probably forty thousand pounds of iron could be produced per horse-power per annum by this method. Liberal allowances were made for those losses which are unavoidable, the above quantity being about half of that theoretically obtainable. Relying on this estimate and on practical data with reference to a certain kind of sand ore existing in abundance in the region of the Great Lakes, including cost of transportation and labour, I found that in some localities iron could be manufactured in this manner cheaper than by any of the adopted methods.

Here “iron” stands for electricity as becomes more apparent later on. We get iron from iron ore. We get electricity from what? A “certain kind of send ore existing in abundance in the region of the Great Lakes”,… where the Niagara falls happen to be,… where Tesla’s hydro-electric power plant was built just a few years earlier...

Method 3: Taking the reader by the hand
Exactly the same thing is said on two occasions with one minor change:

June, 1900:

But for the time being, next to providing new resources of energy, it is of the greatest importance to making improvements in the manufacture and utilization of iron. Great advances are possible in these latter directions, which, if brought about, would enormously increase the useful performance of mankind.

Same article:

This new and inexhaustible source of food-supply will be of incalculable benefit to mankind, for it will enormously contribute to the increase of the human mass, and thus add immensely to human energy. Soon, I hope, the world will see the beginning of an industry which, in time to come, will, I believe, be in importance next to that of iron.

“providing new resources of energy” (quote 1)
=
“new and inexhaustible source of food-supply” (quote 2)

Hidden under the nose of the enemy
It is impossible to convert nay-sayers with this short post, but I just want you to consider the possibility that there might be a treasure hidden in plain sight.
Not in notes that the FBI confiscated after Tesla’s death in 1943, Tesla was far too smart for that as is illustrated by his joke on them leaving a note that a very dangerous weapon was hidden in his hotel locker which turned out to be a resistance box.

The whole code is explained here.