“When I have Fears That I May Cease to Be"是英国浪漫主义诗人约翰·济慈（John Keats）创作的一首诗歌。这首诗表达了诗人对于生命、死亡、爱情和名誉的深刻思考。

这首诗是济慈在1818年创作的，直到他去世27年后才被发表。诗歌中，济慈表达了他对于可能在实现自己的文学抱负之前就去世的恐惧，以及对于可能无法再见到他所爱的人的哀伤。

诗歌全文：

When I have Fears That I May Cease to Be

By John Keats

When I have fearsthat I may cease to be

   Beforemy pen has gleaned my teeming brain,

Before high-pilèdbooks, in charactery,

   Holdlike rich garners the full ripened grain;

When I behold,upon the night’s starred face,

   Hugecloudy symbols of a high romance,

And think that Imay never live to trace

   Theirshadows with the magic hand of chance;

And when I feel,fair creature of an hour,

   ThatI shall never look upon thee more,

Never have relishin the faery power

   Ofunreflecting love—then on the shore

Of the wide worldI stand alone, and think

Till love and fameto nothingness do sink.