The Lord Jesus reminded his disciples that even the hairs of their heads were counted by God, that almighty God knows all things and governs them in his wonderful providence.  This providence held St. Paul awestruck, and the Fathers wrote wonderingly of it.  The Frankish Benedictine monk Ratramus (d. 870), in his book, "On the Providence of God", writes:

"No one whatsoever who believes rightly in God doubts that his presence fills heaven and earth and that divine providence governs the world.  Now, just as nothing is hidden from his wisdom, so his management rules and directs all things.  And just as there is no creature hidden from his sight, so also does he know the actions and thoughts of men.  According to the Scriptures: 'No creature is invisible in his sight, and all things are naked and open to his eyes.  And he who knows all things, disposes all things' (Hebrews 4, 13).  Thus, the Book of Wisdom says: 'All of us are in his hand, and our words, all wisdom, the knowledge of works, and discipline.  He gave me the knowledge of all things that are, that I may know the management of the whole world, the powers of the world, the beginning and end and middle of times, the alterations of their courses, the ends of seasons, changes of manners, the course of the year, the placements of the stars, the force of winds, the thoughts of men, the differences of trees, and the power of roots.  And I have learned of all things hidden and unforeseen, for the Maker of all things taught me wisdom' (Wisdom 7, 16-21).  It is clear that this is said not of some mortal being but only of the Mediator of God and men who is the Power and Wisdom of God the Father, who was made man by him, and from him received the knowledge and understanding of all things.  According to the declaration of the Gospel of John, he was 'full of grace and truth', and to the extent that he was 'made man', constrained within a body, so he was 'the Word made flesh'.  Therefore he knows all things that are hidden and unforeseen', he foresees all things, and knows all intelligible spirits.  And just as he knows all things with the Father, so he manages all things with him."