No, you do not have to put your hand on the Bible in court when swearing to tell the truth. You can choose to affirm instead of swearing on the Bible.
Since oaths are sworn with the raised right hand, the left hand is the only one left to place on the Bible, thus swearing or affirming on the Bible. I think it is not so much significance of the left hand, but that the right hand is always raised for the oath - so the left is the only one left!
Typically, you place your right hand on the Bible when taking an oath in court.
Although there was a Bible present, he did not place his left hand on it for some reason, perhaps religious. His right hand was raised, however.
It was Abraham Lincoln's Bible.
The president is not required to use a book as part of the swearing in ceremony, but most put their hand on a Bible. Pierce used a law book.
It is not pleasant to hear people swearing in the work place.
Swearing on a Bible is a quite modern concept. A Roman man (women could not go to court except in very special circumstances) placed his right hand on his testicles, while swearing by the gods he believed in, and affirmed he would tell the truth; hence the term 'testimony'.
Tom Robinson places his hand on the Bible and takes an oath to tell the truth before testifying in court.
i think it is the word god
Google "left-handed-oath". There is a saying that when you swear with you left hand you do not intend to keep the oath. The left hand is considered 'unclean'- before toilet paper people wiped with their left hand. Therefore, when eating, or shaking someone's hand, you always used your right hand.
Swearing in presidents using only a bible is a tradition. There is no law saying that they must use a bible.