The shamrock, a three-leaf clover, carries deep spiritual significance. In the 4th century, St. Patrick used the shamrock to explain the concept of three persons in one God (the Trinity) to early Christians and it is still widely used today. At first glance, the concept of the Trinity seems very difficult to comprehend, but the wonderful simplicity of the shamrock allows Christians to easily understand and embrace this central concept of their faith. The doctrine of the Trinity, while not specifically set forth in scripture, is a tradition and teaching all Christians believe. In 325, at the First Council of Nicea, the concept of the Trinity was established in the Nicene Creed. This prayer was adopted by early Christians and is regularly recited at Masses throughout the world today. The shamrock has also become a symbol of faith, hope, and love. This symbol was incorporated into the LIV Flag where Christians call on the Father, the Son and the Holy Spirit for the strength to become more virtuous and are united in faith, hope and love.