If you find a saint who has no sense of humour, then he is not a saint at all. Impossible. His very seriousness says that he has not achieved. Once you have some inner experiences of your own you become very playful, you become very innocent, childlike.
If every one said orders were impossible to carry out when they were received where would you be? Where would we all be if you just said, "Impossible," when orders came?
The whole process of nature is an integrated process of immense complexity and it is really impossible to tell whether something that happens in it is good or bad. Because you never know what will be the consequences of the misfortune. Or, you never know what will be the consequences of good fortune.