Search the scriptures; for in them ye think ye have eternal life: and they are they which testify of Me. -John 5:35

I read nothing of salvation in creation. The rocks tell me, “Salvation is not in us;” the winds howl, but they howl not salvation: the waves rush upon the shore, but among the wrecks which they wash up, they reveal no trace of salvation; the fathomless caves of the ocean bear pearls, but they bear no pearls of grace; the starry heavens have their flashing meteors, but they have no voices of salvation. I find salvation written nowhere, till in this volume of my Father’s grace I find His blessed love unfolded towards the great human family, teaching them that they are lost, but that He can save them, and that in saving them He can be “just, and yet the justifier of the ungodly.” Salvation, then, is to be found in the Scriptures, and in the Scriptures only; for we can read nothing of it elsewhere. And while it is to be found only in Scripture, I hold that the peculiar doctrine of revelation is salvation. I believe that the Bible was sent not to teach me history, but to teach me grace; not to give me a system of philosophy, but to give me a system of divinity; not to teach worldly wisdom, but spiritual wisdom. Hence I hold all preaching of philosophy and science in the pulpit to be altogether out of place. I would check no man’s liberty in this matter, for God only is the Judge of man’s conscience; but it is my firm opinion that if we profess to be Christians, we are bound to keep to Christianity; if we profess to be Christian ministers, we drivel away the Sabbath-day, we mock our hearers, we insult God, if we deliver lectures upon botany, or geology, instead of delivering sermons on salvation. He who does not always preach the gospel ought not to be accounted a true-called minister of God.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0084.cfm