Sayings

"The fisrt casualty when war comes is truth." Usually attributed to Hiram Johnson

But actually dating back to Aeschylus (525 -426BC) who wrote “In war, truth is the first casualty.” https://en.wikipedia.org/wiki/Hiram_Johnson

Samuel Johnson put it less succinctly: 'Among the calamities of war may be jointly numbered the diminution of the love of truth, by the falsehoods which interest dictates and credulity encourages.' (from The Idler, 1758)

Also:

"Never take off the mask." Tonto (Johnny Depp) to the Lone Ranger (Armie Hammer) in the 2013 film, The Lone Ranger.

"Look for solutions, not problems." - me and lots of other more famous people.