A thing I am not anxious to preserve
Is this frail life; for soon as one woe ends,
Others commence, and our weak eyes discern not
What evil fortunes yet remain behind.

[αἰεὶ τὸ µὲν ζῇ, τὸ δὲ µεθίσταται κακόν,
τὸ δ’ αὖ πέφηνεν αὖθις ἐξ ἀρχῆς νέον.]

Euripides (485?-406? BC) Greek tragic dramatist

Æolus [Αἴολος], frag. 35 (TGF) [tr. Wodhull (1809)]
    (Source)

Nauck frag. 35, Barnes frag. 51, Musgrave frag. 15, 16. (Source (Greek)). Alternate translations:

One ill is ever clinging;
One treads upon its heels;
A third, in distance springing,
Its fearful front reveals.
[tr. Peacock (1897)]

One trouble alive and well, another gone,
as all afresh a new one comes our way.
[Source]