It is not easy!

Brett has been feeling how tough it is to be a missionary.   The scriptures give him strength.  Ammon in ancient times had similar experiences.    It helps a lot when he gets letters from friends and family.

27 Now when our hearts were depressed, and we were about to turn back, behold, the Lord comforted us, and said: Go amongst thy brethren, the Lamanites, and bear with patience thine afflictions, and I will give unto you success.
28 And now behold, we have come, and been forth amongst them; and we have been patient in our sufferings, and we have suffered every privation; yea, we have traveled from house to house, relying upon the mercies of the world—not upon the mercies of the world alone but upon the mercies of God.
29 And we have entered into their houses and taught them, and we have taught them in their streets; yea, and we have taught them upon their hills; and we have also entered into their temples and their synagogues and taught them; and we have been cast out, and mocked, and spit upon, and smote upon our cheeks; and we have been stoned, and taken and bound with strong cords, and cast into prison; and through the power and wisdom of God we have been delivered again.
30 And we have suffered all manner of afflictions, and all this, that perhaps we might be the means of saving some soul; and we supposed that our joy would be full if perhaps we could be the means of saving some.
31 Now behold, we can look forth and see the fruits of our labors; and are they few? I say unto you, Nay, they are many; yea, and we can witness of their sincerity, because of their love towards their brethren and also towards us.   Alma 26: 27-37