I believe that all wisdom consists in caring immensely for a few right things, and not caring a straw about the rest.

We can pay our debts to the past by putting the future in debt to ourselves.

Leadership is only courage and wisdom, and a great carefulness of self.

Without humility there can be no humanity.

I wondered whether the scientific modern brain could not get to the stage of realising that Space is not an empty homogeneous medium, but full of intricate differences, intelligible and real, though not with our common reality.

Most true points are fine points. There never was a dispute between mortals where both sides hadn't a bit of right.

He disliked emotion, not because he felt lightly, but because he felt deeply.