Contrary to the image of him as president, Reagan was very religious and would not have so easily consented to a culture suddenly demanding the right to redefine what the scriptures (Old TestamentandNewTestament) say clearly about a man and a woman leaving their parents and coming together to form one flesh in marriage.
The virtue of the One Year Bible has always been that it offers daily readings from the OldTestament, the NewTestament, the Psalms, and Proverbs, but it still offers the psychological barriers that come with such a massive undertaking as trying to Read the Whole Thing.
He is heralding the advent of the new religion, and the wall-paintings above him depict OldTestament scenes regarded by medieval theologians as events that prefigure Jesus' life and fate.
Christian thinkers such as William Penn, Roger Williams and John Locke would help the church recover its older tradition of toleration, as old as the NewTestament itself.