All models are approximations. Essentially, all models are wrong, but some are useful. However, the approximate nature of the model must always be borne in mind.

All models are wrong, but some are useful.

Statisticians, like artists, have the bad habit of falling in love with their models.

Remember that all models are wrong; the practical question is how wrong do they have to be to not be useful.

The only way to know how a complex system will behave-after you modify it-is to modify it and see how it behaves.

Just as the ability to devise simple but evocative models is the signature of the great scientist so overelaboration and overparameterization is often the mark of mediocrity.

Discovering the unexpected is more important than confirming the known.

The business of the statistician is to catalyze the scientific learning process.

To find out what happens to a system when you interfere with it you have to interfere with it (not just passively observe it).

The management system which makes only a pretense of valuing employee involvement and encouraging employee empowerment merely breeds cynicism.

Management must provide employees with tools that will enable them to do their jobs better, and with encouragement to use these tools. In particular, they must collect data.

Look at him, ” she said, shaking her head. “Travis Maddox: Mr. Mom.

You fail because you fear. Be bold. Be fearless.

The thing I always say to people is this: 'If you avoid failure, you also avoid success.'

Rounding to the nearest cent is sufficiently accurate for practical purposes.

Love accepts the trying things of life without asking for explanations. It trusts and is at rest.

I was brought up as a Catholic. I've got A-level guilt.

There is always a very delicate interplay between individual actions and institutional conditions.

Today I love myself as I love my god: who could charge me with a sin today? I know only sins against my god; but who knows my god?

But I think that sensitivity is also a good counsellor when it comes to enforcing one's interests.

Stem cells have the potential to be used to treat and better understand some of the world's most deadly and disabling diseases.