In the course of his article ‘The Encyclical Abstraction’ last month, Fr Thomas Gilby, O.P., touched on the distinction between the notions of conscience and ‘prudence’. He suggested that we should conduct our discussions of the moral issues raised by Humanae Vitae with greater precision and usefulness if we resorted to the suppler and ampler notion of ‘prudence’ rather than to that of conscience. ‘Prudence’ is something of a misnomer, carrying with it unfortunate associations for us today. Yet in much of our present discussion we seem to want to make ‘conscience’ do a great deal of the work that was formerly done by the finely analysed and thereby quasi-technical notion of ‘prudence’. It seems sensible, therefore, to take another look at this classical conception, and we do so by publishing here a translation of an extract from the extended Appendix to the French edition of the Summa of St Thomas Aquinas, dealing with Prudence. This piece thus takes its place as one of a series of contributions to a deeper consideration of the encyclical. We intend to publish further reflections in coming months from Mr Michael Dummett, Fellow of All Souls, and from Frs Timothy McDermott and Cornelius Ernst, O.P.

The important place occupied by ‘prudence’, in doctrine as in moral life, in the teaching of Aquinas can be seen clearly enough in his treatise on ‘Prudence’ in the Summa Theologica, 2a 2ae, 47-56. It is only too evident, however, that it has not subsequently kept pride of place in theology, for reasons which are not far to seek.