If I have seen further it is by standing on the shoulders of giants.
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.
If I have ever made any valuable discoveries, it has been owing more to patient attention, than to any other talent.
Tact is the knack of making a point without making an enemy.
I do not know what I may appear to the world; but to myself 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.
A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding.
If I have seen further than others, it is by standing upon the shoulders of giants.