4 If any man attempt to speak of God, let him first describe the bounds of the earth. You dwell on the earth, and the limit of this earth which is your dwelling you know not: how then shall you be able to form a worthy thought of its Creator? You behold the stars, but their Maker you behold not: count these which are visible, and then describe Him who is invisible, Who tells the number of the stars, and calls them all by their names. Violent rains lately came pouring down upon us, and nearly destroyed us: number the drops in this city alone: nay, I say not in the city, but number the drops on your own house for one single hour, if you can, but you can not.
Learn then your own weakness; learn from this instance the mightiness of God: for He has numbered the drops of rain, which have been poured down on all the earth, not only now but in all time. The sun is a work of God, which, great though it be, is but a spot in comparison with the whole heaven; first gaze steadfastly upon the sun, and then curiously scan the Lord of the sun. Seek not the things that are too deep for you, neither search out the things that are above your strength: what is commanded you, think thereupon.
Source: Catechetical Lectures (New Advent)