Så kom Jacques Delors i tanke om en udtalelse fra Charles Péguy: »De mest frugtbare tanker er ikke dem, som er tænkt én gang for alle, men dem, som hyppigst vender tilbage«.
At this point Jacques Delors may have recalled Charles Péguy who said that 'the most fertile ideas are not those about which one has never had doubts, but those to which one has most frequently returned'.