Why at Thanksgiving is it so easy to be grateful? I think it is because we are influenced by the example of others as we each share the things we value and find most precious. The prophet Lehi in the Book of Mormon goes through a similar experience in 1 Nephi 1
First he sees a vision in which “he saw the heavens open, and he thought he saw God sitting upon his throne, surrounded with numberless concourses of angels in the attitude of singing and praising their God. - verse 8
After seeing more in vision (including seeing Jesus Christ and the twelve apostles), Lehi was in an attitude of “praising of his God; for his soul did rejoice, and his whole heart was filled, because of the things which he had seen, yea, which the Lord had shown unto him.” - verse 15
After his heart was full he went and “began to prophesy and to declare unto them concerning the things which he had both seen and heard.” - verse 18
We see gratitude expressed by others, causing us to be grateful, and then we seek for others to feel our same joy. Lehi listened and was grateful he did however, for the Jews who heard him, they chose to “be angry with him… and they sought his life, that they might take it away. - verse 20
How will we react when given the choice between bitterness and gratitude?
For another example look at 1 Nephi 2:16-17 or 1 Nephi 8:11-18