Who comforteth us in all our tribulation, that we may be able to comfort those who are in any trouble by the comfort wherewith we ourselves are comforted by God. – 2 Corinthians 1:4

I do think it often proves a great blessing to a man that he had a terrible conflict, a desperate encounter, a hard-fought engagement in passing from the empire of Satan into the kingdom of God’s dear Son. Sooner or later each saved man will have his hand-to-hand fight with the prince of darkness; and as a general rule, it is a great mercy to have it over on the outset of one’s career, and be able afterwards to feel, “Whatever comes upon me, I never can suffer as I suffered when I was seeking Christ. Whatever staggering doubt, or hideous blasphemy, or ghastly insinuations, even of suicide itself, may assail my feeble heart, they cannot outdo the horror of great darkness through which my spirit passed when I was struggling after a Savior.” Full often have I found it good, when I have talked with a young convert in deep distress about his sin, to tell him something more of his anxious plight than he knew how to express and he wondered where I had found it, though he would not have wondered if he knew where I had been, and how much deeper in the mire than he; when he has talked about some horrible thought that he has had, with regard to the impossibility of his own salvation, and I have said, “Why, I have thought that a thousand times, and yet have overcome it through the help of God’s Spirit.” I know that a man’s own experience is one of the very best weapons he can use in fighting with evil in other men’s hearts. Often their misery and despondency, aggravated, as it commonly is by a feeling of solitariness, will be greatly relieved before it is effectually driven out when they find that a brother has suffered the same, and yet has been able to overcome. Right soon will he look into the same dear face and be lightened; and then he will magnify the Lord with me, and we shall exalt His name together. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0972.cfm