Our Father, who art in heaven.Matthew 6:9
O my Lord, how You do show Yourself to be the Father of such a Son; and how Your Son does show Himself to be the Son of such a Father! May You be blessed forever and ever! This favor would not be so great, Lord, if it came at the end of the prayer. But at the beginning, You fill our hands and give a reward so large that it would easily fill the intellect and thus occupy the will in such a way one would be unable to speak a word.
Oh, daughters, how readily should perfect contemplation come at this point! Oh, how right it would be for the soul to enter within itself in order to rise the better above itself that this holy Son might make it understand the nature of the place where He says His Father dwells, which is in the heavens. Let us go forth from the earth, my daughters, for there is no reason that a favor like this should be so little esteemed, that after we have understood how great it is, we should still want to remain on earth.
O Son of God and my Lord! How is it that You give so much all together in the first words? Since You humble Yourself to such an extreme in joining with us in prayer and making Yourself the Brother of creatures so lowly and wretched, how is it that You give us in the name of Your Father everything that can be given? For You desire that He consider us His children, because Your word cannot fail [cf. Mk 13:31].
Saint Teresa of Avila
The Way of Perfection, chap. 27, nos. 1–2
Teresa of Avila, St. 1985, The Collected Works of St. Teresa of Avila, translated from the Spanish by Kavanaugh, K; Rodriguez, O, ICS Publications, Washington DC.