Nikola Tesla was a famous scientist and inventor in the late 19th and early 20th centuries. He was hailed as one of the men closest to God. His inventions and contributions had a profound impact on modern technology and science. Tesla came up with many creative ideas, including wireless power transmission, alternators, magnetic field power generation, solar energy utilization, and so on. He also invented a power generation device called the Tesla coil, which could generate a powerful current, which caused a sensation at the time. Tesla was also a very controversial figure. Some of his actions and remarks caused social controversy at that time. He was considered a mysterious figure, and many people thought he was sent to Earth by aliens or gods to carry out a mission. Therefore, the reason why Nikola Tesla was called the man closest to God was because he showed extraordinary talent and creativity in many aspects, but also because of some mysterious and controversial actions and statements that made him a controversial historical figure.