The connection between what you see and what you process mentally (and more importantly vice versa) is an incredible demonstration of the power of the human mind. Scientists refer to this as the "up-down connection" and alternatively as the "down-up connection" It is proven that the ability of the mind to process information that the eyes see is also seen in reverse by the ability to see something that the mind has processed or conjured without even really seeing it with your eyes.
Taken to the extreme cases this is prevalent in people with extreme cases of delusional disorders, but to some extent we all do this in daily life. This is important to note because it also means that we manifest mentally can affect how we view different objects and situations. Just an interesting little fact for you to consider...
Here is a selection of extremely interesting stress test, brain exercises and optical illusions. Click on each title to view that test. Although these tests are definitely fun, they also illustrate the immense power of the human mind and the way that it perceives different things.
So go on and entertain yourself and your friends with these free brain tests and see how the different people react. You will be amazed by what you find here!