Conditio beneficialis, quae statum construit, benigne, secundum verborum intentionem est interpretanda; odiosa autem, quae statum destruit, stricte, secundum verborum proprietam, accipienda

A beneficial condition which creates an estate, ought to he interpreted favorably, according to the intent of the language; but an odious condition which destroys an estate, should be construed strictly according to the letter.