Two roads diverged in a wood 

and I took the one less travelled by, 

and that has made all the difference.

Great works are performed not by strength but by perseverance.

To be is to do.

Music expresses that which cannot be said 

and on which it is impossible to be silent.

The secret of genius is to carry the spirit of the child into old age, 

which means never losing your enthusiasm.

The difference between science and the fuzzy subjects is 

that science requires reasoning 

while those other subjects merely require scholarship.

There are a thousand thoughts 

lying within a man 

that he does not know 

till he takes up a pen to write.

Love is the poetry of the senses.

Eyes and ears are poor witnesses to people 

if they have uncultured souls.

Everything we hear is an opinion, not a fact. 

Everything we see is a perspective, not the truth.

Any startling piece of work has a subversive element in it, 

a delicious element often.

Nothing ever becomes real till it is experienced.

Reason obeys itself; 

and ignorance submits to whatever is dictated to it.

What every strong intellect wants to be is a guardian of integrity.

Experience without theory is blind, 

but theory without experience is mere intellectual play.

The pursuit, even of the best things, ought to be calm and tranquil.