Albert Einstein at the age of 70 wrote in a letter to a friend: “You imagine that I look back on my life’s work with calm satisfaction. But from nearby it looks quite different. There is not a single concept of which I am convinced that it will stand firm, and I feel uncertain whether I am in general on the right track.”
I relate this to Heisenberg’s Uncertainty Principle, from quantum mechanics.
There are fundamental limits to the precision with which certain properties of atomic particles can be known. For example, the more precisely the position of a particle is determined, the less precisely its momentum can be known, and vice versa.
At the most essential level, uncertainty and doubt are implicit in Nature.
So in our lives, certainty about our choices and beliefs can hardly be expected. Even Einstein wonders about his life’s work. Given that, then the best we can do is make well considered choices, adapt and learn as we go, and enjoy the sun when it’s shining.
Too much doubt weakens us toward immobility; too little doubt and we harden in self righteousness.
A dash of doubt gifts us humility and openness … and odd moments of bliss.