After a while he became disagreeably affected by the sight of the roadway...

After a while he became disagreeably affected by the sight of the roadway thronged with vehicles and of the pavement crowded with men and women. He was in a long, straight street, peopled by a mere fraction of an immense multitude; but all round him, on and on, even to the limits of the horizon hidden by the enormous piles of bricks, he felt the mass of mankind mighty in its numbers. They swarmed numerous like locusts, industrious like ants, thoughtless like a natural force, pushing on blind and orderly and absorbed, impervious to sentiment, to logic, to terror, too, perhaps.
That was the form of doubt he feared most. Impervious to fear! Often while walking abroad, when he happened also to come out of himself, he had such moments of dreadful and sane mistrust of mankind. What if nothing could move them ? Such moments come to all men whose ambition aims at a direct grasp upon humanity -- to artists, politicians, thinkers, reformers, or saints. A despicable emotional state this, against which solitude fortifies a superior character.