Dedicated to the Lord Jesus Christ Who loved us, gave Himself for us, and washed us from our sins in His own Blood; and to the Church, which is His body.

The truths of God are hidden for His children, not from them. The Holy Spirit has been instructed to teach us all things (John 14:26) and has given us an unction so that we will know all things (1 John 2:20). We only have to use what He  has given us.
What God desires is that His New Testament saints know, what the Old Testament saints could not know, and that is "Christ in you the hope of glory." The coming of the Messiah was predicted in the Old Testament, but the idea that He would actually dwell in us was beyond anyone's imagination. The New Testament is clear that Christ, by the Holy Spirit, takes up permanent residence in all believers. This is a wonderful truth that some fail to fully appreciate. 
Solomon said at the dedication of the temple, "But will God indeed dwell on the earth? behold, the heaven and heaven of heavens cannot contain thee; how much less this house that I have builded?" We could say, "How much less this physical body?" 
The Lord's commitment to dwell in us and never leave us or forsake us (Hebrews 13:5), must be taken as an indication of His great love for us. If we continually thought upon this, with all its implications, how could we ever be lonely or discouraged? We couldn't! Depression and self-pity would be gone!
Why would it matter what others thought of us if we truly understood how much Jesus thought of us?
Our attitudes and fears reveal that this revelation of "Christ in us" is not a well established revelation in most Christians. This verse makes it clear that our Father wants to make "the riches of the glory of this mystery" known unto us. We should all be seeking a greater revelation of this truth.