Happiness is a sound egg

This is also evidenced in eggs, whereof the sound ones sink, and such as are addled swim; as do also those that are termed hypanemiae, or wind-eggs.

-- Sir Thomas Browne (1605-1682), Pseudodoxia Epidemica: Of Swimming, and Floating

Happiness is birds of little throats, and short

Birds that are most canorous,

and whose notes we most commend,

are of little throats, and short.

-- Sir Thomas Browne, Enquiries into Common and Vulgar Errors, 1646