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.

Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life. Youth means a temperamental predominance of courage over timidity of the appetite, for adventure over the love of ease. This often exists in a man of sixty more than a boy of twenty. Nobody grows old merely by a number of years. We grow old by deserting our ideals. Years may wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self-distrust bows the heart and turns the spirit back to dust. Whether sixty or sixteen, there is in every human being's heart the lure of wonder, the unfailing child-like appetite of what's next, and the joy of the game of living.

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 only being in a way like it might be an animal. No, it is not just like being an animal so much as being like one of these malenky toys you viddy being sold in the streets, like little chellovecks made out of tin and with a spring inside and then a winding handle on the outside and you wind it up grrr grrr grrr and off it itties, like walking, O my brothers. But it itties in a straight line and bangs straight into things bang bang and it cannot help what it is doing. Being young is like being like one of these malenky machines.

The young know how truly difficult and dreadful youth can be. Their youth is wasted on everyone else, that's the horror. The young have no authority, no respect.

Youth, n. The Period of Possibility, when Archimedes finds a fulcrum, Cassandra has a following and seven cities compete for the honor of endowing a living Homer.

Youth is the leaven that keeps all these questioning, testing attitudes fermenting in the world. If it were not for this troublesome activity of youth, with its hatred of sophisms and glosses, its insistence on things as they are, society would die from sheer decay. It is the policy of the older generation as it gets adjusted to the world to hide away the unpleasant things where it can, or preserve a conspiracy of silence and an elaborate pretense that they do not exist. But meanwhile the sores go on festering just the same. Youth is the drastic antiseptic. It will not let the elders cry peace, where there is no peace. By its fierce sarcasms it keeps issues alive in the world until they are settled right. It drags skeletons from closets and insists that they be explained. No wonder the older generation fears and distrusts the younger. Youth is the avenging Nemesis on its trail.

Yes yes yes, there it was. Youth must go, ah yes. But youth is only being in a way like it might be an animal. No, it is not just like being an animal so much as being one of these malenky toys you viddy being sold in the streets, like little chellovecks made out of tin and with a spring inside and then a winding handle on the outside and you wind it up grrr grrr grrr and off it itties, like walking, O my brothers. But it itties in a straight line and bangs straight into things bang bang and it cannot help what it is doing. Being young is like being like one of these malenky machines.

This is what youth is. The sheer belief that you will be able to keep every promise you made to someone else. That you will be able to love someone into forever when you do not even understand what forever means.

This fighting-shy of every obligation partly explains the phenomenon, half ridiculous, half disgraceful, Of the setting-up in our days of the platform of "youth" as youth. … In comic fashion people call themselves "young," because they have heard that youth has more rights than obligations, since it can put off the fulfilment of these latter to the Greek Kalends of maturity. …[T]he astounding thing at present is that these take it as an effective right precisely in order to claim for themselves all those other rights which only belong to the man who has already done something.

Youth is a period of missed opportunities.

How absurd to call youth the time of happiness–youth, the time of greatest vulnerability!

people run away from burdens these days. There's nothing they hate more than to be burdened or tied. This accounts for this perverse cult of youthfulness: youth is in itself the yet unburdened state - so we worship youthful looks as the sign and symbol of that craving, almost the promise of its fulfilment. But to attempt to keep it for ever only leads to sterility in every sense: monstrous perversion of youth, destined as blossom of the fruit...

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