What does a journal written by frontier settlers most likely tell you about manifest destiny?

Manifest Destiny is the god given right to expand. Frontier settlers mostly resided in the West, so it tells you that manifest destiny had occurred, and people were moving west for land expansion in the USA. It occurred throughout the 1840's, but was expressed throughout colonial times. Democrats of the time were fanatics of the idea of Western expansion, and pushed for it through president Tyler and Polk.