The number seven has long been connected with luck, perfection, and gaining knowledge in many cultures throughout history. One reason for this might be that the number seven has special mathematical properties. The ancient Greeks called 7 “the perfect number,” the sum of 3 (triangle) and 4 (square), which are perfect forms. Also, the number seven in the Bible is considered one of the most powerful and lucky numbers in scripture, according to the practice of gematria. Seven refers to the Creation of the world, accomplished by God in seven days according to Genesis. The Hebrew word for “luck,” gad, equals seven in gematria.