I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.


There is one thing stronger than all the armies in the world; and that is an idea whose time has come.

If I have seen further it is by standing on the shoulders of giants. If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent

I can calculate the motion of heavenly bodies but not the madness of people.


This most beautiful system [The Universe] could only proceed from the dominion of an intelligent and powerful Being.


I keep the subject of my inquiry constantly before me, and wait till the first dawning opens gradually, by little and little, into a full and clear light.


Tact is the knack of making a point without making an enemy.


We build too many walls and not enough bridges.