Euclids Elements logic is very systematic and straightforward with well defined rules that you can follow. Reason on the other hand gets more complicated in that there are less solid guidelines to follow in using it. Rationality, however, contains the whole complex of human energy that you work with and more importantly the feelings that we all have. Through rationality I use logic and reason but also feelings to determine the truthfulness of my conclusions.
If I end with a philosophical conclusion feeling helpless, sad, negative, depressed, etc... I know by trusting my feelings that the conclusion I came up with is false and shouldn't be implemented. If instead I get a conclusion that gives me joy and an inspiration to co-create something new into my life, then I came up with something good that will help people and the world. The goal of all my philosophical conclusions is to confirm the perfection and beauty that is life!
Now anti-rationality is when you leave out those important feelings and come up with spockmania as you may call it. By following this example you get the artificial reality we have created today which destroys and exploits the natural world (gods thoughts) in order to sustain itself for a temporary period of time until it can't no longer.
On the other hand feeding those
rational conclusions with your thought and actions makes you nourish and cultivate the natural world that we are an important part of. For the natural world is eternal by way of auto-genesis and provides objects that were created by a vastly superior intelligence than the artificial ones that are created today and, consequently, by interacting with the natural world we can attain higher truths that will help reciprocally serve to create the paradise on Earth(or eden if you will) that is the birthright for every given man. This is our journey back to our pristine origins. Back to knowing god through his creations.