59 "Folly is bound up in the heart of a child and the rod of correction shall drive it away." Disorderly inclinations then must be corrected, good tendencies encouraged and regulated from tender childhood, and above all the mind must be enlightened and the will strengthened by supernatural truth and by the means of grace, without which it is impossible to control evil impulses, impossible to attain to the full and complete perfection of education intended by the Church, which Christ has endowed so richly with divine doctrine and with the Sacraments, the efficacious means of grace.
Source: Divini Illius Magistri (Vatican.va)