There is no succession in God. God is without succession or chance. It is a quality of eternity; “from everlasting to everlasting he is God,” i.e. the same. God doth not only always remain in being, but he always remains the same in that being: “thou art the same” (Psalm 102:27). The being of creatures is successive; the being of God is permanent, and remains entire with all its perfections unchanged in an infinite duration. Indeed, the first notion of eternity is to be without beginning and end, which notes to us the duration of a being in regard of its existence; but to have no succession, nothing first or last, notes rather the perfection of a being in regard of its essence. The creatures are in a perpetual flux; something is acquired or something lost every day. A man is the same in regard of existence when he is a man, as he was when he was a child; but there is a new succession of quantities and qualities in him. Every day he acquires something till he comes to his maturity; every day he loseth something till he comes to his period. A man is not the same at night that he was in the morning; something is expired, and something is added; every day there is a change in his age, a change in his substance, a change in his accidents. But God hath his whole being in one and the same point, or moment of eternity. He receives nothing as an addition to what he was before; he loseth nothing of what he was before; he is always the same excellency and perfection in the same infiniteness as ever. His years do not fail (Heb. 1:12), his years do not come and go as others do; there is not this day, tomorrow, or yesterday, with him. As nothing is past or future with him in regard of knowledge, but all things are present, so nothing is past or future in regard of his essence. He is not in his essence this day what he was not before, or will be the next day and year what he is not now. All his perfections are most perfect in him every moment; before all ages, after all ages. As he hath his whole essence undivided in every place, as well as in an immense space, so he hath all his being in one moment of time, as well as in infinite intervals of time.
Some illustrate the difference between eternity and time by the similitude of a tree, or a rock standing upon the side of a river, or shore of the sea; the tree stands always the same and unmoved, while the waters of the river glide along at the foot. The flux is in the river, but the tree acquires nothing but a diverse respect and relation of presence to the various parts of the river as they flow. The waters of the river press on, and push forward one another, and what the river had this minute, it hath not the same the next. So are all sublunary things in a continual flux. And though the angels have no substantial change, yet they have an accidental; for the actions of the angels this day are not the same individual actions which they performed yesterday: but in God there is no change; he always remains the same. Of a creature, it may be said he was, or he is, or he shall be; of God it cannot be said but only he is. He is what he always was, and he is what he always will be; whereas a creature is what he was not, and will be what he is not now. As it may be said of the flame of a candle, it is a flame: but it is not the same individual flame as was before, nor is it the same that will be presently after; there is a continual dissolution of it into air, and a continual supply for the generation of more. While it continues it may be said there is a flame; yet not entirely one, but in a succession of parts. So of a man it may be said, he is in a succession of parts; but he is not the same that he was, and will not be the same that he is. But God is the same, without any succession of parts and of time; of him it may be said, “He is.” He is no more now than he was, and he shall be no more hereafter than he is. God possesses a firm and absolute being, always constant to himself. He sees all things sliding under him in a continual variation; he beholds the revolutions in the world without any change of his most glorious and immovable nature. All other things pass from one state to another; from their original, to their eclipse and destruction; but God possesses his being in one indivisible point, having neither beginning, end, nor middle.