ચારણે સીવડાવે તે મુતરવાનો માર્ગ રાખે.

cāraṇē sīvaḍāvē tē mutaravānō mārga rākhē.

Literally: He who builds a wall keeps a path for urinating.
What it means: Even when creating a solution, people often leave a small, convenient loophole for themselves.
The English proverb Shah set beside it: Every sore has its salve.

Also said as

ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1923) ગુજરાતી કહેવતસંગ્રહ (Gujarati Kahevat Sangrah) (1921) · 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.