The is always much to be said for not attempting more than you can do and for making a certainty of what you try. But this principle, like others in life and war, has it exceptions.
You have to run risks. There are no certainties in war. There is a precipice on either side of you - a precipice of caution and a precipice of over-daring.
Safety and certainty in oil lie in variety, and variety alone.
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