Mark 16:14

And upbraided them with their unbelief - Never were there a people so difficult to be persuaded of the truth of spiritual things as the disciples. It may be justly asserted, that people of so skeptical a turn of mind would never credit any thing till they had the fullest evidence of its truth. The unbelief of the disciples is a strong proof of the truth of the Gospel of God. See the addition at the end.