A man snatches the first kiss, pleads for the second, demands the third, takes the fourth, accepts the fifth - and endures all the rest. Helen Rowland
A wise person has expectations of themselves, while a fool has demands for others... Source: Internet
I believe that true beauty of chess is more than enough to satisfy all possible demands. Alexander Alekhine
If the Sultan demands five eggs, let his soldiers roast a thousand chickens. Persian Proverb
When necessity speaks, it demands. Russian Proverb
The doctor demands his fees whether he has killed the illness or the patient. Polish Proverb