by Reb Nati at Mystical Paths
Hashem spoke to Moshe (Moses), "Come to Pharoah, for I have made his heart and the heart of his servants stubborn so that I can put these signs of Mine in his midst; and so that you may relate in the ears of your son and your son's son that I made a mockery of Egypt and My signs that I placed among them - that you may know that I am Hashem."
The first plague introduces a new element. Hashem informs Moshe that He intends to make a mockery out of Egypt; flattening the pride of and fully crushing the ego of Pharaoh and his ministers, so that not only Egypt but also the Jews would know that "I Am Hashem:. The inclusion of the Jews in that category implies that even believing people are often imperfect in their emunah (faith).
That Pharaoh had resisted the evidence of the divine origin of the plagues is not a surprise. But even though the Jews were people of faith, their faith was not shalem perfect. It was not until the creas yam suf - splitting of the reed sea that the Torah says of the bnei yisroel (the sons of Israel) that they had emunah (faith) in Hashem and in His servant Moshe.
With the war that we just went through (though it appears unclear if it's actually ended or just taking a brief pause) we still want to explain away all the nisim (miracles) that happened. I spoke with tank crews yesterday and they told story after story of open miracles.
"And so that you may relate" - this is the of aspect of emunah, belief to such a degree that we would continue to tell of these events, "to our sons and son's sons" forever. Emunah is increased as we speak of the deeds of our Father in Heaven, for all of those who hear us and even within ourselves. Emunah is gift we can give to each other that can't be refused. When I speak to you and tell that Hashem is great, He really becomes great in our heart and in our minds. This is what we call 'Hoda'ah', we elevate all of creations as a result.
Chazal teach us that the words we speak create. If we speak with emunah then we repair and draw the world closer to Hashem. But if we complain and kvetch or explain away every detail as natural, then we distance and damage the world.
We can literally change the world for the good or the bad just with our speech. We must understand, exercise this and repair the damage.
BS"D - בסיעתא דשמיא