…he that believeth not the Son shall not see life; but the wrath of God abideth on him. – John 3:36

It must be admitted that not a few of these (unbelieving) persons are blameless as to their morals. You could not, with close observation, find either dishonesty, falsehood, uncleanness, or malice in their outward life. They are not only free from these blots, but they manifest positive excellences. Much of their character is commendable. They frequently are courteous and compassionate, generous and gentle-minded. Often times they are so amiable and admirable, that while looking upon them, we understand how our Lord, in a similar case, loved the young man who asked, “What lack I yet?” The one thing needful they are destitute of is they have not believed in Christ Jesus, and loath as the Savior was to see them perish, yet it cannot be helped, one doom is common to all who believe not. They shall not see life, but the wrath of God abides on them. “God is angry with the wicked every day.”

In many cases these persons are, in addition to their morality, religious persons after a fashion. They would not absent themselves from the usual service of the place of worship. They are most careful to respect the Sabbath, they venerate the Book of God, they use a form of prayer, they join in the songs of the Sanctuary, they sit as God’s people sit and stand as God’s people stand. But alas, there is a worm in the center of that fair fruit, they have missed the one essential thing, which, being omitted, brings certain ruin. They have not believed on the Son of God. Ah, how far a man may go, and yet, for lack of this one thing, the wrath of God may still abide upon him. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/1012.cfm