Those little nimble musicians of the air that warble forth their curious ditties with which nature hath furnished them to the shame of art.

If I've got food and water as long as I can exercise my mind and keep it nimble then I'll be okay.

Famous pivot stories are often failures but you don't need to fail before you pivot. All a pivot is is a change is strategy without a change in vision. Whenever entrepreneurs see a new way to achieve their vision - a way to be more successful - they have to remain nimble enough to take it.