When you realize
Is too complex
That only God can hold it together
will have to make
The Uncertainty Principle: The position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision.
This is not a statement about the inaccuracy of measurement instruments, nor a reflection on the quality of experimental methods; it arises from the wave properties inherent in the quantum mechanical description of nature.
Even with perfect instruments and technique, the uncertainty is inherent in the nature of things.[ref] quoted from: http://hyperphysics.phy-astr.gsu.edu/hbase/uncer.html%5B/ref%5D