But a certain Samaritan, as he journeyed, came where he was: and when he saw him, he had compassion on him, And went to him, and bound up his wounds, pouring in oil and wine, and set him on his own beast, and brought him to an inn, and took care of him. – Luke 10:33, 34

When the good Samaritan found the poor man half dead, if he had not hoped about him he would never have poured in the oil and the wine, but would have left him there to die. Cultivate great hopefulness about sinners. Always hope of them that they will be saved yet: though no good signs are apparent in them. If you have done your best for them, and have been disappointed and defeated, still hope for them. Sometimes you will find cause for hope in the fact that they begin to attend a place of worship. Grasp at that, and say, “Who can tell? God may bless them.” Or if they have long been hearers, and no good has come of it, still hope that the minister will one day have a shot at them, and the arrow shall pierce through the joints of the harness. When you last spoke to them there seemed a little tenderness: be thankful for it, and have hope. If there has been a little amendment in their life, be hopeful about them. Even if you can see nothing at all hopeful in them, yet hope that there may be something which you cannot see, and perhaps an effect has been produced which they are endeavouring to conceal. Hope because you are moved to pray for them. Get other people to pray for them, for as long as they have some one to pray for them their case is not given over. If you get others to pray, there will be another string to your bow. If they are very ill, and you cannot get at them, or they are on their dying beds, still have hope about them, and try to send them a message in some form or other. Pray the Lord to visit and save them; and always keep up your hope about them. Till they are dead let not your hope be dead. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1617.cfm