Robert Traill (Sermons from 1 Peter 1:1-4), Works 4:21:
A great many persons think that this doctrine of the Trinity is a vast deep, and so it is; and they think it is not a subject to be preached on, and that there is danger of unsavoury, unwarrantable, and presumptuous thoughts about it. I do acknowledge something of all this to be true, that there is danger in it, and that it should be warily handled; but when is it that poor souls begin to find the doctrine of the Trinity true, and believe it, and know their concern in it, but only when the salvation of Christ is begun to be applied to them? Whensoever this salvation is applied to the poor soul, then immediately the believer begins to be concerned about all the Three; then he begins to be concerned about the Father’s electing love, and to be concerned about the redeeming grace of the Son, for an interest therein; then he begins to be concerned about the sanctification of the Spirit, and the influences of his grace. There is never a believer in all the world, but his daily exercise lies about all these three. As the blessed Three in the Godhead have a distinct part in the work of our salvation, so every believer has a distinct exercise about each of these distinct persons.
A great many persons think that this doctrine of the Trinity is a vast deep, and so it is; and they think it is not a subject to be preached on, and that there is danger of unsavoury, unwarrantable, and presumptuous thoughts about it. I do acknowledge something of all this to be true, that there is danger in it, and that it should be warily handled; but when is it that poor souls begin to find the doctrine of the Trinity true, and believe it, and know their concern in it, but only when the salvation of Christ is begun to be applied to them? Whensoever this salvation is applied to the poor soul, then immediately the believer begins to be concerned about all the Three; then he begins to be concerned about the Father’s electing love, and to be concerned about the redeeming grace of the Son, for an interest therein; then he begins to be concerned about the sanctification of the Spirit, and the influences of his grace. There is never a believer in all the world, but his daily exercise lies about all these three. As the blessed Three in the Godhead have a distinct part in the work of our salvation, so every believer has a distinct exercise about each of these distinct persons.
