One cannot step twice in the same river.

The god you worship 

is the god you deserve.

The unexamined life is not worth living.

Be as you wish to seem.

Now my own suspicion is that 

the Universe is not only queerer than we suppose, 

but queerer than we can suppose.

Ignorance more frequently begets confidence than does knowledge: 

it is those who know little, and not those who know much, 

who so positively assert that this or that problem will never be solved by science.

Imagination will often carry us to worlds that never were. 

But without it we go nowhere.

Science is organised knowledge. 

Wisdom is organised life.

The essence of life 

is statistical improbability 

on a colossal scale.

We need creativity 

in order to break free from the temporary structures 

that have been set up by a particular sequence of experience.

The difficulty lies, 

not in the new ideas, 

but in escaping the old ones, 

which ramify, 

for those brought up as most of us have been, 

into every corner of our minds.

Science is what you know. 

Philosophy is what you don't know.

Wherever the poetry of myth is interpreted
as biography, history, or science, 

it is killed.

Eternity is a dimension of here and now.