I would like to thank our host, Stephan Narison, an expert of QCD sum rules, to have invited a representative of the opposition to give a talk at this conference. As you know there are several approaches to spectroscopy: Lattice QCD, still very remote if one want to go beyond the quenched approximation, QCD sum rules which give very interesting results, but cannot give an answer to every question in spite of what believes (or believed) my friend Hector Rubinstein, the Bag model , potential models. In fact the Bag model and potential models are not incompatible. It was shown long ago by Hasenfratz, I-Iorgan, Kuti, and Richard[l] that if one treats the bag model in the BornOppenheimer approximation, i.e. if one minimizes the energy of the Bag for a given configuration of the quarks, one ends up with a SchrSdinger equation and an effective potential. Some of my friends from the ITEP group, like M. Voloshin, are very skeptical on the potential approach. My position is that it is mostly justified by its successes, and I hope to convince you of that . I agree that there are many mysteries: why is the flavor independent of the potential working so well, why relativistic effects can be disregarded at least for energy levels etc. But as you will see, it works. During the sixties, it seemed that the SchrSdinger equation was becoming obsolete, except perhaps in calculating the energy levels of muonic or pionic atoms, or the medium energy nucleonnucleon scattering amplitude from a field theoretical potential[2]. Elementary particle masses were hoped to be obtained from the bootstrap mechanism[3], or with limited but spectacular success from symmetries[4]. At the beginning of the quark model only very few physicists considered quarks as particles, and tried to calculate the hadron spectrum from them. Among these I could quote Dalitz[5] almost preaching in the desert at the Oxford conference in 1965 and Gerassimov[6]. The situation changed drastically after the October 1974 revolution. As soon as the J/¢[7][8] and the ¢*[9] had been discovered the interpretation of these states as charm-anticharm bound states was universally accepted and potential models using the SchrSdinger equation were proposed[10][ll]. In fact the whole hadron spectroscopy was reconsidered in the framework of the quark model and QCD in the crucial paper of De Rujula Georgi Glashow [12] and the independent papers of Sakharov and Zeldovitch[13] and Sakharov[14]. Impressive fits of spectra of baryons (including those containing light quarks) were obtained in particular by Stanley and Robson[15][16], Karl and Isgur[17], Richard and Taxil[18], Ono and SchSberl[19], Basdevant and Boukraa[20] and