"But straightway Jesus spake unto them, saying, Be of good cheer; it
is I; be not afraid. And Peter answered him and said, Lord, if it be
thou, bid me come unto thee on the water. And he said, Come. And when
Peter was come down out of the ship, he walked on the water, to go
to Jesus. But when he saw the wind boisterous, he was afraid; and
beginning to sink, he cried, saying, Lord, save me. And immediately
Jesus stretched forth his hand, and caught him, and said unto him, O
thou of little faith, wherefore didst thou doubt?"
Matthew 14:27-32
"Did I not speak peace to your mind concerning the matter? What
greater witness can you have than from God?"
Doctrine & Covenants 6:23
"Wherefore, if God so clothe the grass of the field, which to day is,
and to morrow is cast into the oven, shall he not much more
clotheyou, O ye of little faith? Therefore take no thought,
saying, What shall we eat? or, What shall we drink? or, Wherewithal
shall we be clothed? But seek ye first the kingdom of God, and his
righteousness; and all these things shall be added unto you. Take
therefore no thought for the morrow; for the morrow shall take
thought for the things of itself. Sufficient unto the day is the evil
thereof."
Matthew 6:30-31,33-34
And whoso receiveth you, there I will be also, for I will go before
your face. I will be on your right hand and on your left, and my
Spirit shall be in your hearts, and mine angels round about you, to
bear you up."
Doctrine & Covenants 84:88
"Fear not to do good, my sons, for whatsoever ye sow, that shall ye
also reap; therefore, if ye sow good ye shall also reap good for your
reward. Therefore, fear not, little flock; do good; let earth and
hell combine against you, for if ye are built upon my rock, they
cannot prevail. Look unto me in every thought; doubt not, fear not."
Doctrine & Covenants 6:33-34,36
"Behold, I speak with boldness, having authority from God; and I
fear not what man can do; for perfect love casteth out all fear."
Moroni 8:16
And Jesus rebuked the devil; and he departed out of him: and the
child was cured from that very hour. Then came the disciples to Jesus
apart, and said, Why could not we cast him out? And Jesus said unto
them, Because of your unbelief: for verily I say unto you, If ye
have faith as a grain of mustard seed, ye shall say unto this
mountain, Remove hence to yonder place; and it shall remove; and
nothing shall be impossible unto you."
Matthew 17:18-20