why are presidents sworn in on the bible
Oath of office of the President of the United States By convention, incoming presidents raise their right hand and place the left on a Bible or other book while taking the oath of office. In 1789, George Washington took the oath of office with an altar Bible borrowed from the St. John's Lodge No. 1, Ancient York Masons lodge in New York, and he kissed the Bible afterward.[17][18] Subsequent presidents up to and including Harry Truman, followed suit.[19] Dwight Eisenhower broke that tradition in 1953 when he said a prayer instead of kissing the Bible.[20]
Oath of Allegiance (United States) I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the Armed Forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely without any mental reservation or purpose of evasion; so help me God.[2]