One way we can understand the idea is with a yesod established by the Sfas Emes (Parashas Vayishlach), which states that every bit of shefa from Above descends from a place that lacks nothing—a place that is perfect, and where there’s no refraction or contraction (צמצום) of Hashem’s light.
Because it comes from the Ribbono shel Olam, it contains everything we need, and it has the ability to sustain us (even if it may not be apparent), as we will explain:
Hidden Potential
We can understand this concept when we think about the development of a child in its mother’s womb. Everything the child will need for his entire life is there—it must only be brought out into the world. The same applies to trees. Look at a tree in the winter months. It’s barren and dry. There’s nothing there. But when spring comes, the tree will sprout abundant fruit. Where did this come from? The answer is that the fruit is part of the potential of this tree. It’s all there already.
When we look at the world around us, we will see this phenomenon of hidden potential—a reality that is here, albeit hidden—it is all around us. It’s hidden in פנמיות and potential. When the sun comes out and the rain falls, it brings the potential out to the fore. But in truth it was always there.
The Water Was Always There, Waiting to Be Noticed
The Sfas Emes points to the Midrash עד סומין בחזקת הכל בנימין רבי אמר עיניהם את מאיר שהקב"ה, everything is hidden from our eyes until the Ribbono shel Olam illuminates our eyes. He cites the story of Hagar, who had no water in the desert until HaKadosh Baruch Hu opened her eyes to see the water that had always been there.
That is, everything is right here in creation. We must only open our eyes to see it. Since the world was created by the Ribbono shel Olam, it must be perfect and boundless. Even if things may seem limited and lacking, it is only to our eyes; the פנימיות shefa that animates it is a spiritual force that has no boundaries and limits. If the matter exists, and it has been created by Hashem, it is from an eternal place, and thus it contains much more perfection than we may see.
The more a person recognizes and acknowledges this fact, and the more he thanks the Ribbono shel Olam for the perfect world into which He has placed him, because his eyes will become illuminated to see that perfection. His heart and eyes will be opened, and he will begin to feel that he has everything, because everything is truly here.
