mark 11:23 For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith. - Free Bible Online

      23. For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed . . . he shall have whatsoever he saith--Here is the lesson now. From the nature of the case supposed--that they might wish a mountain removed and cast into the sea, a thing far removed from anything which they could be thought actually to desire--it is plain that not physical but moral obstacles to the progress of His kingdom were in the Redeemer's view, and that what He designed to teach was the great lesson, that no obstacle should be able to stand before a confiding faith in God.

JFB.