Meaning everything should be simple by itself, but it is not as simple as its value.
This quote from Albert Einstein came too late in my understanding, I think there may not have come too many people understood, no matter take an example.
Suppose if any scientist makes a new machine, then he should make the machine so simple that no one can use it very easily.
But the machine is not as simple as anybody can make it, then there will be no value of the machine.
Any scientist made us fan to save us from the heat but how easy it is to use just press the button and the heat disappears, just imagine if what would happen if we had to go through the fan's physics to run a fan. No fan will be used by tomorrow.
That's why Istin has said that everything should be simple in itself, but not as simple as its value.