ગાવું ગળામાં, ઉલટ વગર આવે નહીં.

gāvuṁ gaḷāmāṁ, ulaṭa vagara āvē nahīṁ.

Literally: Singing in the throat, it does not come without enthusiasm.
What it means: Nothing is done well without genuine interest or desire.
The English proverb Shah set beside it: Nothing is imposible to a willing mind.

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.