Youth has no age.

To me, young has no meaning. It’s something you can do nothing about, nothing at all. But youth is a quality. And if you have it, you never lose it.

Youth is not an age thing. It's a quality. Once you've had it, you never lose it.

To the young there are no degrees of old just as there are no degrees of dead - either you are, or you are not.

Age isn't how old you are but how old you feel.

To be young means to be original, to have remained nearer to the sources of life: it means to be able to stand up and shake off the fetters of an outlived civilization, to dare — where others lack the courage — to plunge again into the elemental.

El amor no tiene edad; siempre está naciendo.

No one who is young is ever going to be old.

When you're young you don't realize that at every age you are always in the present, and in that sense no older;

Je suis jeune, il est vrai mais aux âmes bien nées
La valeur n'attend pas le nombre des années

From childhood to youth is eternity, from youth to manhood, a season. Age comes in a night and is incredible.

I am not old, but my young way was never the way to age.

Age does not make us childish, as some say; it finds us true children.

And in the end, it's not the years in your life that count. It's the life in your years.