Purity, patience and perseverance overcome all obstacles. All great things must of necessity be slow.

I'm convinced that about half of what separates successful entrepreneurs from the non-successful ones is pure perseverance.

I have tried 99 times and have failed, but on the 100th time came success.

Stories of perseverance and extraordinary courage always inspire me. This piece in a book called Everyday Greatness by Stephen R. Covey has remained with me ever since.

How does one get ideas? By sheer perseverance to the point of madness.

When I was young, I observed that nine out of ten things I did were failures. So I did ten times more work.