Circumstances alter cases.

Thomas C Haliburton (1796-1865): The Old Judge. Chap. xv.

  Man is not the creature of circumstances. Circumstances are the creatures of men.

Benjamin Disraeli (Earl Beaconsfield) (1805-1881): Vivian Grey. Book vi. Chap. vii.

  You had that action and counteraction which, in the natural and in the political world, from the reciprocal struggle of discordant powers draws out the harmony of the universe.

Edmund Burke (1729-1797): Reflections on the Revolution in France. Vol. iii. p. 277.

  The happy combination of fortuitous circumstances.

Sir Walter Scott (1771-1832): Answer to the Author of Waverley to the Letter of Captain Clutterbuck. The Monastery.

  Circumstances over which I have no control.