Apparently it stems from quantum physics and is simply stated in Wikipedia as stating that
by precise inequalities...certain pairs of physical properties, such as position and momentum, cannot be simultaneously known to arbitrarily high precision. That is, the more precisely one property is measured, the less precisely the other can be measured.
Which got me thinking: how often does that happen in life? You look intensely at one thing, you lose the ability to correctly perceive another. Step back; take stock. Keep the bigger picture in view.
Kudos, Mr Heisenberg.