Jesus heard that they had cast him out; and when He had found him, He said unto him, “Dost thou believe on the Son of God?” He answered and said, “Who is He, Lord, that I might believe on Him?” And Jesus said unto him, “Thou hast both seen Him, and it is He that talketh with thee.” And he said, “Lord, I believe.” And he worshipped Him. – John 9:35-38

Now, strange to say, here is a pressed man; for I do not think that this man, whose eyes had been opened by Christ, had thought of becoming a believer in the Son of God until the Lord Jesus found him out. Before he had reached that point; indeed, before he knew that the Prophet who had opened his eyes was the Son of God, the Pharisees had cast him out of the synagogue, so that he was compelled to bear the cross for Christ although he did not then fully know Christ, and certainly had not believed upon the Son of God. Yet, in his case also, it appears that he cheerfully took up the cross which had been at the first forcibly laid upon him…This man, then, bearing Christ’s cross in a certain way, was cast out of the synagogue, and then Christ found him, and blessed him.

Observe, dear friend, where Christ began with him; for it will show us where and how the blessing usually enters. The door by which the richest of heaven’s favors must come to us is indicated by our Lord going to that door, and opening it. He said to the man, “Dost thou believe on the Son of God.” So that faith in the Son of God is the gate of benediction. Faith is that window of agate and gate of carbuncle by which the divine light of Jesus’ love comes streaming into the soul…So, in this enquiry of our Lord, we have most instructive teaching. His object, no doubt, was to bless this man by working in him saving faith, and therefore He said to him, “Dost thou believe on the Son of God?” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2667.cfm