When I suffered some loss what Jesus said came to my mind: “If anyone wants to sue you and take your shirt, let him have your coat also.” (Mathew 5:40) Principle behind this statement made flash to me: ‘Here shirt is only a symbol of material things/comfort. If you suffer a loss, have the mind-set that I have no problem even if I suffer some greater loss,’ and my worry immediately disappeared.
Whether Jesus was a historical figure or not matters not if what he (supposedly) said happens to be of great practical help.