Design a vision board collage anchored on the concept of 'Lord Willing.' The board should contain various elements including inspirational quotes, optimistic images conveying prosperous future, and visual representations of personal desires. Also, include spiritual symbols that signify hope, faith, and divine guidance. However, maintain the collage's tone as serene, harmonious, and motivational with a blend of natural tones. Also, incorporate elements such as a peaceful sunrise, a calm sea, soaring birds, and lush green fields to represent life's blessings, possibilities, and aspirations.