Even theories must have foundations.

I have ever been prone to seek adventure and to investigate and experiment where wiser men would have left well enough alone.

When Tarzan killed he more often smiled than scowled, and smiles are the foundation of beauty.

So strong is the power of superstition that even though we know that we have been reverencing a sham, yet still we hesitate to admit the validity of our new-found convictions.

I knew nothing about the technique of story writing, and now, after eighteen years of writing, I still know nothing about the technique, although with the publication of my new novel, Tarzan and the Lost Empire, there are 31 books on my list.

I loved her. I still love her, though I curse her in my sleep, so nearly one are love and hate, the two most powerful and devasting emotions that control man, nations, life.

Traveling through space is stupifyingly monotonous.