સગેજ જાણે શ્વાસ, શ્વાસ પણ સગો નહીં;

sagēja jāṇē śvāsa, śvāsa paṇa sagō nahīṁ;

Literally: Even a relative knows the breath, but breath is not a relative.
What it means: In the end, one is alone; even one's own life force is not a permanent companion.

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.