"The ideal of a reconciled humanity was expressed in the harmony between prayer and action in the world, between the search for perfection and the secular condition, with the help of God’s grace that permeates the human being and, without destroying him, purifies him, raising him to divine heights. To Theotimus, the spiritually mature Christian adult to whom a few years later he addressed his Treatise on the Love of God,  St Francis de Sales offered a more complex lesson. 

At the beginning it presents a precise vision of the human being, an anthropology: human “reason”, indeed “our soul in so far as it is reasonable”, is seen there as harmonious architecture, a temple, divided into various courts around a centre, which, together with the great mystics he calls the “extremity and summit of our soul, this highest point of our spirit”. 

This is the point where reason, having ascended all its steps, “closes its eyes” and knowledge becomes one with love (cf. Book I, chapter XII). The fact that love in its theological and divine dimension, may be the raison d’être of all things, on an ascending ladder that does not seem to experience breaks or abysses, St Francis de Sales summed up in a famous sentence: “man is the perfection of the universe; the spirit is the perfection of man; love, that of the spirit; and charity, that of love” (ibid., Book X, chap. 1). 

In an intensely flourishing season of mysticism The Treatise on the Love of God was a true and proper summa and at the same time a fascinating literary work. 

St Francis’ description of the journey towards God starts from recognition of the “natural inclination” (ibid., Book 1, chapter XVI), planted in man’s heart — although he is a sinner — to love God above all things. 

According to the model of Sacred Scripture, St Francis de Sales speaks of the union between God and man, developing a whole series of images and interpersonal relationships. His God is Father and Lord, husband and friend, who has the characteristics of mother and of wet-nurse and is the sun of which even the night is a mysterious revelation. Such a God draws man to himself with bonds of love, namely, true freedom for: “love has neither convicts nor slaves, but brings all things under its obedience with a force so delightful, that as nothing is so strong as love nothing also is so sweet as its strength” (ibid., Book 1, chapter VI). 

In our Saint’s Treatise we find a profound meditation on the human will and the description of its flowing, passing and dying in order to live (cf. ibid. Book IX, chapter XIII) in complete surrender not only to God’s will but also to what pleases him, to his “bon plaisir”, his good pleasure (cf. ibid., Book IX, chapter I). 

As well as by raptures of contemplative ecstasy, union with God is crowned by that reappearance of charitable action that is attentive to all the needs of others and which he calls “the ecstasy of action and life” (ibid., Book VII, chapter VI). 

In reading his book on the love of God and especially his many letters of spiritual direction and friendship one clearly perceives that St Francis was well acquainted with the human heart. He wrote to St Jane de Chantal: 

“... this is the rule of our obedience, which I write for you in capital letters: do all through love, nothing through constraint; love obedience more than you fear disobedience. I leave you the spirit of freedom, not that which excludes obedience, which is the freedom of the world, but that liberty that excludes violence, anxiety and scruples” (Letter of 14 October 1604).

It is not for nothing that we rediscover traces precisely of this teacher at the origin of many contemporary paths of pedagogy and spirituality; without him neither St John Bosco nor the heroic “Little Way” of St Thérèse of Lisieux would have have come into being."