What if you did everything right and discovered on your deathbed that you've wasted your life?
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The most common form of despair is not being who you are. And yet the self is not a fixed thing to be discovered, but a possibility to be created — which is perhaps why so many prefer the despair.
Søren Kierkegaard — The Sickness Unto Death
Feynman began to glimpse the special powerlessness that medical uncertainty can inflict on a scientific person. He had come to believe that the scientific way of thinking brought a measure of calmness and control in difficult situations — but not now.
Maria Popova
It is not the possession of truth, but the success which attends the seeking after it, that enriches the seeker and brings happiness to him.
Max Planck — The Philosophy of Physics