There are wonders enough out there without our inventing any.

Somewhere, something incredible is waiting to be known.

It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.

The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.

Imagination will often carry us to worlds that never were. But without it we go nowhere.

I don't want to believe. I want to know.

The absence of evidence is not the evidence of absence.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

For small creatures such as we the vastness is bearable only through love.

You have to know the past to understand the present.

Whatsoever you set your hands on doing, do it in such a way that your work will always stand out.

When my book 'Rich Dad's Prophecy' was released in 2002, most financial newspapers and magazines trashed it because I discussed a looming stock market crash.

The question isn't so much "Are you parenting the right way?" as it is: "Are you the adult that you want your child to grow up to be?"

I care passionately about equal rights [and] animal rights.

Without poetry, stories would be told in sepia.

I remember once, when I started writing for the alto saxophone, a saxophonist told me to think of it as being like a cross between an oboe and a viola, but louder.

I learned lots of dirty jokes very young. There was this girl who told me them. The gang I led went in for shoplifting and pulling girls' knickers down. Other boys' parents hated me.

I believe that we learn by practice.

What if...? A question we ask to hurt ourselves.