Hicks' work was influenced by a specific Quaker belief referred to as the "Inner Light." George Fox and other founding Quakers had established and preached the Inner Light doctrine. Fox explained that along with scriptural knowledge, many individuals achieve salvation by yielding one's self-will to the divine power of Christ and the "Christ within". This "Christ in You" concept was derived from the Bible's Colossians 1:27. Hicks depicted humans and animals to represent the Inner Light's idea of breaking physical barriers (of difference between two individuals) to working and living together in peace. Many of his paintings further exemplify this concept with depictions of Native Americans meeting the settlers of Pennsylvania, with William Penn prominent among them.