Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. – Acts 4:12

There are thousands of persons, even in this highly-favoured, greatly- enlightened country, who really do not know what the Gospel means. The knowledge of salvation is within their reach, but they have no desire to acquaint themselves with this best of all the sciences. We are all sinners, they say; but they do not know what they mean. In the jargon of general confession they lose sight of their own personal transgressions. The plan of salvation by a Substitute, which is the gist of the whole matter, never dawned on their understanding. They do not know the great truth that Jesus took our sins and suffered for us in our room, and in our stead, that justice might be satisfied, that mercy might be magnified, and that we sinners might be liberated. Hence it comes to pass that whosoever trusteth in Christ is saved. Being ignorant of this, they are still depending upon their own works, merits, and professions, or they are relying upon their baptism, their confirmation, or their identification with some ecclesiastical system by means of some outward ceremony, instead of understanding that salvation is by faith, a thing of the heart in the spirit, and not in the letter. This ignorance of the blessed Saviour prevents many from receiving Him joyfully. So was it with the woman of Samaria; hence the Saviour said to her, “If thou hadst known the gift of God, and who it is that speaks to thee, thou wouldst have asked, and He would have given thee living water.” Lest ye perish through lack of knowledge, brethren, do entreat the Lord so to guide you in the reading of Scripture, and in listening to the exposition of Scripture that you may get a clear understanding of the way of the Lord. “That the soul should be without knowledge is not good,” for ignorance is the parent of many infatuations. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3487.cfm