How to influence nations

The apostles of nations were all interior men, endowed with a sublime spirit of prayer. The salvation of souls being a supernatural end, the instruments ought to bear a proportion to it, and preaching proceed from a grace which is supernatural. To undertake this holy function, without a competent stock of sacred learning, and without the necessary precautions of human prudence and industry, would be to tempt God. But sanctity of life and the union of the heart with God, are a qualification far more essential than science, eloquence, and human talents. Many almost kill themselves with studying to compose elegant sermons, which flatter the ear yet reap very little fruit. Their hearers applaud their parts, but very few are converted. Most preachers, now-a-days, have learning, but are not sufficiently grounded in true sanctity, and a spirit of devotion. Interior humility, purity of heart, recollection, and the spirit and the assiduous practice of holy prayer, are the principal preparation for the ministry of the word, and the true means of acquiring the science of the saints. A short devout meditation and fervent prayer, which kindle a fire in the affections, furnish more thoughts proper to move the hearts of the hearers, and inspire them with sentiments of true virtue, than many years employed barely in reading and study. St. Patrick, and other apostolic men, were dead to themselves and the world, and animated with the spirit of perfect charity and humility, by which they were prepared by God to be such powerful instruments of his grace, as, by the miraculous change of so many hearts, to plant in entire barbarous nations not only the faith, but also the spirit of Christ. Preachers, who have not attained to a disengagement and purity of heart, suffer the petty interests of self-love secretly to mingle themselves in their zeal and charity, and have reason to suspect that they inflict deeper wounds in their own souls than they are aware, and produce not in others the good which they imagine.
Rev. Alban Butler (1711–73). Volume III: March.
The Lives of the Saints. 1866. March 17 St. Patrick, Bishop and Confessor, Apostle of Ireland