Faith does the impossible because it brings God to undertake for us, and nothing is impossible with God. How great — without qualification or limitation — is the power of faith! If doubt be banished from the heart, and unbelief made stranger there, what we ask of God shall surely come to pass, and a believer hath vouchsafed to him “whatsoever he saith.”
Prayer projects faith on God, and God on the world. Only God can move mountains, but faith and prayer move God. In His cursing of the fig-tree our Lord demonstrated His power. Following that, He proceeded to declare, that large powers were committed to faith and prayer, not in order to kill but to make alive, not to blast but to bless.
E. M. Bounds, The Necessity of Prayer, Logos Bible Software Edition