A young man talked to me about his spiritual life. He had been a Christians for several years, but he was concerned that he might not be fulfilling the will of God in his life. He spoke of coldness of heart and a lack of spiritual power. I could tell that he was discouraged - and afraid of hardness of heart.
I gave him a helpful expression which has come from the writings of Bernard of Clairvaux: 'My brother, only the heart is hard that does not know it is hard. Only he is hardened who does not know he is hardened. When we are concerned for our coldness, it is because of the yearning God has put there. God has not rejected us'.
Tozer, Whatever happened to worship (Buckinghamshire: Authentic Media, 2009), p. 65.