I did manage to find this 1939 book and read it:
“And these human relations must be created. One must go through an apprenticeship to learn the job. Games and risk are a help here. When we exchange manly handshakes, compete in races, join together to save one of us who is in trouble, cry aloud for help in the hour of danger —only then do we learn that we are not alone on earth.” p. 29

“What saves a man is to take a step. Then another step.It is always the same step, but you have to take it.” p.38

“Life has taught us that love does not consist in gazing at each other but in looking outward together in the same direction. There is no comradeship except through union in the same high effort.” p. 215

I think I’ve read that last quotation in a greeting card somewhere, but that only makes it shopworn, perhaps, not untrue. Saint Exupery’s strength in Wind, Sand, and Stars is the stories he tells about his almost death of dehydration stranded in the Sahara desert, about his experiences in Spain during the Spanish civil war, about flying over the Pyrenees and the Andes. To get those stories, you’ll have to read the book.

His diagnosis of the plight of mankind and the cause of war is not so profound. He says that we all believe in something, and “fulfillment is promised each of us by his religion.” All beliefs are essentially the same, and we must not discuss ideologies. We must instead understand that “what all of us want is to be set free.” “There are two hundred million men in Europe whose existence has no meaning and who yearn to come alive,” writes Saint Exupery.

I don’t know if Saint Exupery was a Christian although he was educated in Jesuit schools. Nevertheless, he ends his book with these rather cryptic words: “Only the Spirit, if it breathe upon the clay, can create Man.”

Read the book, and his other classic Le Petit Prince and draw your own conclusions.