In the case of the majority of saints, sanctity and knowledge seem to be two different things. Our admiration goes to the heroic penances they have imposed upon themselves, the uncompromising apostolate they have carried out, the outpourings of love which have been their heart's expression or the martyrdom which has crowned their life. As a general rule, we do no realize that intellectual excellence may have a connection with tb merits which raise a Christian to the altars. The interest of the case of St Thomas Aquinas is that in him we are compelled to investigate this problem. That the Church solemnly canonize him less than fifty, years after his death is a fact, as is also tn circumstance that his life was given in a remarkable degree to the work of the mind. It was spent in intellectual activity as exclusive and intense as one could wish.