NOTE H. See vol. ii. p. 147.
THE ORIGIN OF THE MAXIM—'IN NECESSARIIS UNITAS, ETC.'
The expression 'In necessariis unitas, in non necessariis libertas, in omnibus caritas' is cited by Richard Baxter in the dedication of On the True and Only Way of Concord of all Christian Churches, 1679, thus, 'I once more quote you the pacificator's old and despised words.' But the pacificator appears to be no one older than a Protestant who wrote (1620 to 1640), under the name of Rupertus Meldenius, a Paraenesis votiva pro pace ecclesiae ad theologos Augustanae Confessionis. In the Paraenesis occurs the sentence 'si nos servaremus in necessariis unitatem, in non necessariis libertatem, in utrisque caritatem optimo certe loco essent res nostrae.' See A. P. Stanley in Macmillan, Sep., 1875, referring to G. C. F. Lücke, Ueber das Alter, den Verfasser, die ursprüngliche Fonn und den wahren Sinn des kirchlichen Friedensspruchs: 'in necessariis unitas &c.,' Göttingen, 1850.
This information was supplied me in correction of a mistaken attribution of the saying of which I was guilty in a sermon; and has been verified for me by Mr. Arthur Hirtzel. The saying has been commonly attributed to St. Augustine, and indeed the matter of it is thoroughly in his spirit; cf. my Ephesians, p. 272; and see also De Gen. ad litt., viii. 5: 'Melius est dubitare de occultis quam litigare de incertis.' De Civ. Dei, xix. 18: 'qua [i.e. faith in scripture] salva atque certa, de quibusdam rebus quas neque sensu, neque ratione percepimus, neque nobis per Scripturam canonicam claruerunt, nec per testes, quibus non credere absurdum est, in nostram notitiam pervenerunt, sine iusta reprehensione dubitamus.'