De Agricultura

For if they come to this contest, being private individuals engaging in a struggle against men experienced in warfare, they will by all means be defeated; the one who is only beginning, because he is destitute of experience; the one who is in a state of progress, because he is still imperfect; and the one who is perfect, because he is not yet thoroughly practised in virtue. But just as it is necessary that plaster, after it has been applied to a wall, must become solid and acquire firmness, so also it is indispensable that the souls of those who have attained to perfection, must become strengthened, and be established on firmer foundations by continual study and incessant practise.