I have seen the travail, which God hath given to the sons of men to be exercised in it. – Ecclesiastes 3:10

If souls were given us without any effort, anxiety or prayer it would be our loss to have it so, because the anxieties which throb within a compassionate spirit exercise his graces; they produce grateful love to God; they try his faith in the power of God to save others; they drive him to the mercy-seat; they strengthen his patience and perseverance, and every grace within the man is educated and increased by his travail for souls. As labor is now a blessing, so also is soul-travail; men are fashioned more fully into the likeness of Christ thereby, and the whole church is by the same emotion quickened into energy. The fire of our own spiritual life is fanned by that same breath which our prayers invite to come from the four winds to breath upon the slain. Besides, dear friends, the zeal that God excites within us is often the means of effecting the purpose which we desire. After all, God does not give conversions to eloquence, but to heart. The power in the hand of God’s Spirit for conversions is heart coming in contact with heart. This is God’s battle-axe and weapons of war in His crusade. He is pleased to use the yearnings, longings, and sympathies of Christian men, as the means of compelling the careless to think, constraining the hardened to feel, and driving the unbelieving to consider. I have little confidence in elaborate speech and polished sentences, as the means of reaching men’s hearts; but I have great faith in that simple-minded Christian woman, who must have souls converted or she will weep her eyes out over them; and in that humble Christian who prays day and night in secret, and then avails himself of every opportunity to address a loving word to sinners. The emotion we feel, and the affection we bear, are the most powerful implements of soul-winning. God the Holy Ghost usually breaks hard hearts by tender hearts. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1009.cfm