Tranquility(n): the quality or act of being serene; The person in this picture is meditating and examining the beauty of nature. This is what the Transcendentalists taught people to do, to understand and realize the true beauty of nature.
And all I need to do is just breathe. Just breathe a prayer of thankfulness, for all You do. Just breathe a prayer of worship, an offering unto You. Just breathe a prayer, surrendering, "Thy will be done" anew. Then all I need to do is just breathe.