Think for a second about this struggle.
Moses struggled with it on his seemingly suicide mission. He lead the Israelites into the wilderness with the Egyptian armies on their heels. He was leading them right towards the Red Sea with no reasonable possibilities of escape. There is no doubt that him and his followers were struggling with the logic of their situation and having faith in God that he would deliver them.
Peter experienced it. He was fishing for days with no success when the Savior approached him and said to throw in his net into the water. He replied, "We have toiled all the night, and have taken nothing." This response is not surprising, for I would have said the same. How ridiculous was this suggestion. Especially coming from a carpenter.
Think of Job who lost everything. He never lost his faith, even when it was easy to.
Nephi showed the same faith. What an obscure request he was given by his father. But still he followed the request in complete faith with no knowledge of where to go, what do to, or how things would turn out.
Tad R. Callister in 'The Infinite Atonement' addresses this topic. "Each of us faces the time when the powers of reason come in direct conflict with faith. All the logic, all the understanding of men may swell on unison, and there alone, in opposition, stands faith - unalterable, unassailable, unmoveable - the anchor to our souls. The tides of trial can come, the ocean waves of worldly reason pound against our souls, the current and popular trends tug with all their mighty sway, but there unmoved, unfazed, unharmed is the soul that is anchored by faith."
"O world, thou choosest not the better part!
It is not wisdom to be only wise,
And on the inward vision close the eyes,
But it is wisdom to believe the heart.
Columbus found a world, and had no chart,
Save one that faith deciphered in the skies;
To trust the soul's invincible surmise
Was all his science and his only art.
Our knowledge is a torch of smokey pine
That lights the pathway but one step ahead
Across a void of mystery and dread.
Bid, then, the tender light of faith to shine
By which alone the mortal heart is led
Unto the thinking of the thought divine."
- Philosopher George Santayana