Corruption is a tree, whose branches are Of an immeasurable length: they spread Ev'rywhere; and the dew that drops from thence Hath infected some chairs and stools of authority. John Fletcher
One falls to the ground in trying to sit on two stools. François Rabelais
Sometimes we feel we straddle two cultures; at other times, that we fall between two stools. Salman Rushdie
Chairs sink and stools rise. Portuguese Proverb
Between two stools one falls to the ground. Spanish Proverb
Between two stools you come to the ground. Dutch Proverb