Experience, however, has been teaching the more extensive merchants, and teaching them perhaps more readily because they have less difficulty than others in getting fishermen, that free or unindebted men are the most successful fishermen; and that to act on the old Shetland maxim, 'If you once get a man into debt, you have a hold over him,' is to fill their boats with inferior or at least half-hearted men, and their books with bad debts.
"Second Shetland Truck System Report"
William Guthrie
He was a Cartesian, and was probably not unindebted to Descartes for the force and vigour of his reasonings, though he was hardly so careful as his master in enlarging the field of his knowledge and assuring the validity of his premises.
"A Short History of French Literature"
George Saintsbury