This picture is called "Light of the World" by William Holman Hunt and was painted in 1853-1854, who was part of the Pre-Raphaelite movement. It's a really famous image and yet I haven't encountered it before. It continues to inspire so many people with all it hidden messages which were so popular with the Pre-Raphaelites. There is a great explanation of it here.
One of the reasons I found this so inspiring is the perspective of time, that an artist created something which is continuing to inspire over 150 years later and is being shared online too all over the world, which Holman Hunt could never have dreamed of.