There is no External; Everything you experience is a result of your existence and is thus Internal.
Your Neurons synthesize your mind your Mind in turn determines Neural networks; It can thus be said even in the realm of Neuroscience that you create your reality;
Your Shadow precedes you in time: Tread lightly. Learn yourself with care.
These are your final days, Self. Each frame of 'Reality' presents itself to an entirely new "You" for "You" are a fleeting image, a frame, supported by Neurons for a brief yet continuous moment.