The secret of the Lord is with them that fear him; and he will shew them his covenant (Psalms 25:14, KJV).
For the froward is abomination to the Lord: but his secret is with the righteous (Proverbs 3:32, KJV).
He that dwelleth in the secret place of the most High shall abide under the shadow of the Almighty. (Psalms 91:1, KJV)
Those of us that are in a relationship with the Lord should have a sensitivity to the things that God would show or reveal to us by way of His Spirit. Having a real relationship with God is not just going to church or bible study, but it is walking and living in agreement with the things that Holy Spirit would reveal to us in following Jesus. We are not to always reveal everything that God would reveal to us. Some of the secret things between you and God is for you to know Him better and to improve your view of who He is. Before we go out and try to preach or teach we need to make sure that we are not prideful of what we know, but to obey what the Lord would have us to say and do for His glory.