Men's minds are like the pieces on a chess-board in their way of moving.
 Oliver Wendell Holmes Sr., The Poet at the Breakfast-Table (1872). copy citation

Context

“We won't try it now, because I want to read you something out of my book. —I have noticed that the Master very rarely fails to come back to his original proposition, though he, like myself, is fond of zigzagging in order to reach it. Men's minds are like the pieces on a chess-board in their way of moving. One mind creeps from the square it is on to the next, straight forward, like the pawns. Another sticks close to its own line of thought and follows it as far as it goes, with no heed for others' opinions, as the bishop sweeps the board in the line of his own color.” source