Then came she and worshipped Him, saying, “Lord, help me.”

“I have been praying ever so long, and I have received no cheering reply.” Well, if thou believest in Jesus, thou shalt have a good reply before long. If thou canst but hold on to Christ, determined to plead with Him till He answers thee, He will answer thee kindly ere long. But keep on believing that He can and will give thee what thou needest, and thou shalt not be disappointed. “Oh,” says one, ” you do not know who I am! I am an outcast.” So was the woman. She was a Canaanitish woman, yet she obtained a blessing from Christ; and thou shalt get one, too, if thou dost follow her in her faith. “Oh, but I do not think that I am fit!” Did Christ ever say to you that you were a dog? He did as good as tell this woman that; yet she held on to Him by faith, and prevailed. “Oh, but I have prayed in vain for such a long time!: So did she. She prayed, and for a while, she received no answer. “Oh, but I feel worse after I have prayed!” So did she; for instead of getting a comfortable answer, she heard Christ say, “It is not meet to take the children’s bread, and to cast it to dogs.” You cannot be in a worse plight than she was. “But the devil troubles me,” you add. The devil also troubled her. She pleaded about her daughter, who was possessed with a devil; and she kept on pleading and believing. She meant to have Christ. I exhort you to come to the same holy determination. Oh, that Almighty grace might help you so to do; for in so doing you will surely get an answer of peace! You will get a comfortable answer before very long, probably much earlier than you have reckoned upon.

Remember that Christ delays in order to increase your faith. Your faith will grow by exercise: therefore He tests it that you may use it, and that thus it may become stronger.~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2253.cfm