you never miss the water till the well runs dry

Proverb

 * 1) People tend to take things for granted that are easily available.

Translations

 * Finnish: asiaa ei osaa arvostaa ennen kuin sen menettää
 * Jamaican Creole: cow neva know di use a 'im tail till 'im lose it
 * Polish: brać za pewnik, wziąć za pewnik