ક્ષણ ભરનો ભરોસો નથી, કરે કાલની વાત;

kṣaṇa bharanō bharōsō nathī, karē kālanī vāta;

Literally: There is no trust in a single moment, yet they talk of tomorrow.
What it means: It is foolish to make grand plans for the future when human life is so unpredictable and fragile.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) · read from the scan by machine — the Gujarati itself is unchecked · English is machine-made and nobody has checked it yet

Heard it differently, or know we've got the sense wrong? Tell us — that is exactly the kind of correction this needs.