杞人忧天 (Qǐ rén yōu tiān): lit. like the man of 杞[Qi3] who feared the sky would fall; fig. to entertain groundless fears

rényōutiān

lit. like the man of 杞[Qi3] who feared the sky would fall; fig. to entertain groundless fears

The man of Qi who would not eat for fear the sky would fall. For anxiety about what will not happen.