I honestly and truly do not buy for a minute that God would not allow His church to be evident beyond the shadow of any doubt.
Luke 10:
21 At that time Jesus, full of joy through the Holy Spirit, said, "I praise you, Father, Lord of heaven and earth, because
you have hidden these things from the wise and learned, and revealed them to little children. Yes, Father, for
this was your good pleasure.
22 "All things have been committed to me by my Father. No one knows who the Son is except the Father, and no one knows who the Father is except the Son and those to whom the Son chooses to reveal him." 23 Then he turned to his disciples and said privately, "Blessed are the eyes that see what you see. 24 For I tell you that many prophets and kings wanted to see what you see but did not see it, and to hear what you hear but did not hear it."
Matthew 13:44 "The kingdom of heaven is like treasure
hidden in a field. When a man found it, he hid it again, and then in his joy went and sold all he had and bought that field.
Ephesians 3:
4 In reading this, then, you will be able to understand my insight into the mystery of Christ, 5 which was not made known to men in other generations as
it has now been revealed by the Spirit to God's holy apostles and prophets.... 8 Although I am less than the least of all God's people, this grace was given me: to preach to the Gentiles the unsearchable riches of Christ, 9 and to make plain [to everyone]* the administration of this mystery, which for ages past was kept hidden in God, who created all things. 10
His intent was that now, through the church, the manifold wisdom of God should be made known to the rulers and authorities in the heavenly realms,
* "the words enclosed by [ ] are of doubtful authenticity with regard to the original text" (both the NA and UBS Greek texts enclose this in brackets)