People generally quarrel because they cannot argue.

There can be no knowledge without emotion. 

We may be aware of a truth, 

yet until we have felt its force, 

it is not ours. 

To the cognition of the brain 

must be added 

the experience of the soul.

Every particular in nature, 

a leaf, a drop, a crystal, a moment of time 

is related to the whole, 

and partakes of the perfection of the whole.

The heart is the chief feature of a functioning mind.

A little learning is a dangerous thing; 

Drink deep, or taste not the Pierian spring.

Most of the mistakes in thinking 

are inadequacies of perception 

rather than mistakes of logic.

The uncreative mind can spot wrong answers, 

but it takes a very creative mind to spot wrong questions.

Don't only practice your art, 

but force your way into its secrets; 

art deserves that, 

for it and knowledge can raise man to the Divine.

To define a thing is to substitute the definition for the thing itself.

There is a vitality, 

a life force, 

an energy, 

a quickening, 

that is translated through you into action, 

and because there is only one of you in all time, 

this expression is unique.

All experience is subjective.

Anxiety is the beginning of conscience, 

which is the parent of the soul 

but is not compatible with innocence.

People demand freedom of speech 

as a compensation 

for the freedom of thought 

which they seldom use.

Fidelity is the sister of justice.

Rise above principle and do what's right.

Let us be grateful to the mirror for revealing to us our appearance only.

In fact, it is a farce to call any being virtuous 

whose virtues do not result 

from the exercise of its own reason.

All my life through, the new sights of Nature made me rejoice like a child.

Science cannot solve the ultimate mystery of nature. 

And that is because, in the last analysis, 

we ourselves are a part of the mystery that we are trying to solve.

Prejudices, 

it is well known, 

are most difficult to eradicate 

from the heart whose soil has never been loosened or fertilised by education; 

they grow firm there, 

firm as weeds among stones.

To raise new questions, 

new possibilities, 

to regard old problems from a new angle, 

requires creative imagination 

and marks real advance in science.

Character, in great and little things, means carrying through what you feel able to do.

All our knowledge has its origins in our perceptions.

In the landscape of extinction, 

precision is next to godliness.

It is the supreme art of the teacher 

to awaken joy 

in creative expression 

and knowledge.

To handle a language skilfully 

is to practice a kind of evocative sorcery.

What we need 

is not the will to believe, 

but the wish to find out.

No man's error becomes his own Law; 

nor obliges him to persist in it.

Dare to be true. 

Nothing can need a lie: 

a fault which needs it most, 

grows two thereby.

All we know is still infinitely less than all that remains unknown.

Great things are done by a series of small things brought together.

Absence diminishes mediocre passions and increases great ones, 

as the wind extinguishes candles and fans fires.

Life is an unanswered question, 

but let's still believe in the dignity and importance of the question.

The true secret of happiness lies in taking a genuine interest in all the details of daily life.

Most ignorance is vincible ignorance. 

We don't know because we don't want to know.

The spirit of truth 

and the spirit of freedom — 

these are the pillars of society.

The only business of the head in the world 

is to bow a ceaseless obeisance to the heart.

The gift of writing is to be self-forgetful, 

to get a surge of inner life 

or inner supply 

or unexpected sense of empowerment, 

to be afloat, 

to be out of yourself.

Power is not alluring to pure minds.

Great things are not accomplished by those who yield 

to trends and fads and popular opinion.

People are like stained-glass windows. 

They sparkle and shine when the sun is out, 

but when the darkness sets in, 

their true beauty is revealed 

only if there is a light from within.

A mind that is stretched by a new experience 

can never go back to its old dimensions.

Light tomorrow with today!

I am my own muse, 

the subject I know best.

The more that you read, 

the more things you will know. 

The more that you learn, 

the more places you'll go.

Science is the search for truth, 

that is, the effort to understand the world: 

it involves the rejection of bias, of dogma, of revelation, 

but not the rejection of morality.

Laughter is the sun that drives winter from the human face.