As he worked to explain the key concepts of Christianity to Celts across Ireland, Patrick used simple examples his audience could understand. Most famously, he was said to have picked a three-leafed clover and used it to explain the idea of the Holy Trinity – that God is one being in three persons, God the Father, God the Son and God the Holy Spirit. The leaves represent these three distinct persons while the stem visually depicts how they are united into one. You can get shamrocks at local garden centers this time of year to serve as a visual reminder that God is always with us.