It is believed that no barometer or measuring tool can be used to quantify the bliss a person feels in any given moment in their life. However, a new study conducted by German psychologist, Dr Edinger-Schons, found that measuring life satisfaction is as close as you can get to quantifying happiness. He found that the overarching sense of ‘oneness’ is used to envisage the overall contentment in the life of a person.
Over 67,000 were gathered to complete a survey and after dividing the respondents by religion, Muslims were found to feel the greatest sense of oneness, leading to a greater sense of well-being. 
Furthermore, a professor at the University of Illinois created a scale for happiness, or the ‘satisfaction with life scale’ (SWLS). It consisted of five questions in order to determine how satisfied a person is with their life. Each question had a ranking from one to seven, and according to this, the higher the score, the more satisfied you are with your life.
Another survey in 2016 concluded that “highly religious” people are more likely to be ‘very happy’ in life.1 90% of these ‘very happy’ people were Christians; though, now the German psychologist has concluded that the idea of ‘oneness’ is the common denominator that runs through people with a higher level of spirituality in their respective faiths.
Over 67,000 non-students were surveyed by researchers at the University of Mannheim in Germany to determine how ‘oneness’ affected life satisfaction across different religions. Due to the belief that they were connected to something larger than themselves, it was found that Muslims were most likely to be the ones with a higher life satisfaction over other faiths. ‘Oneness’ as a personality marker can be used to distinguish between people who seek and make more meaningful connections with others, the world around them, and the almighty entity of God.