How we must meditate on God
BUT the contemplation of God is gained in a variety of ways. For we not only discover God by admiring His incomprehensible essence, a thing which still lies hid in the hope of the promise, but we see Him through the greatness of His creation, and the consideration of His justice, and the aid of His daily providence: when with pure minds we contemplate what He has done with His saints in every generation, when with trembling heart we admire His power with which He governs, directs, and rules all things, or the vastness of His knowledge, and that eye of His from which no secrets of the heart can lie hid, when we consider the sand of the sea, and the number of the waves measured by Him and known to Him, when in our wonder we think that the drops of rain, the days and hours of the ages, and all things past and future are present to His knowledge; when we gaze in unbounded admiration on that ineffable mercy of His, which with unwearied patience endures countless sins which are every moment being committed under His very eyes, or the call with which from no antecedent merits of ours, but by the free grace of His pity He receives us; or again the numberless opportunities of salvation which He grants to those whom He is going to adopt–that He made us be born in such a way as that from our very cradles His grace and the knowledge of His law might be given to us, that He Himself, overcoming our enemy in us simply for the pleasure of His good will, rewards us with eternal bliss and everlasting rewards, when lastly He undertook the dispensation of His Incarnation for our salvation, and extended the marvels of His sacraments to all nations. But there are numberless other considerations of this sort, which arise in our minds according to the character of our life and the purity of our heart, by which God is either seen by pure eyes or embraced: which considerations certainly no one will preserve lastingly, if anything of carnal affections still survives in him, because “thou canst not,” saith the Lord, “see My face: for no man shall see Me and live;” viz., to this world and to earthly affections.
A question on the changing character of the thoughts
GERMANUS. How is it then, that even against our will, aye and without our knowledge idle thoughts steal upon us so subtilely and secretly that it is fearfully hard not merely to drive them away, but even to grasp and seize them? Can then a mind sometimes be found free from them, and never attacked by illusions of this kind?
The answer what the mind can and what it cannot do with regard to the state of its thoughts
MOSES. It is impossible for the mind not to be approached by thoughts, but it is in the power of every earnest man either to admit them or to reject them. As then their rising up does not entirely depend on ourselves, so the rejection or admission of them lies in our own power. But because we said that it is impossible for the mind not to be approached by thoughts, you must not lay everything to the charge of the assault, or to those spirits who strive to instil them into us, else there would not remain any free will in man, nor would efforts for our improvement be in our power: but it is, I say, to a great extent in our power to improve the character of our thoughts and to let either holy and spiritual thoughts or earthly ones grow up in our hearts. For this purpose frequent reading and continual meditation on the Scriptures is employed that from thence an opportunity for spiritual recollection may be given to us, therefore the frequent singing of Psalms is used, that thence constant feelings of compunction may be provided, and earnest vigils and fasts and prayers, that the mind may be brought low and not mind earthly things, but contemplate things celestial, for if these things are dropped and carelessness creeps on us, the mind being hardened with the foulness of sin is sure to incline in a carnal direction and fall away.