“If we have anxiety, it means we don’t trust that everything will be OK.” Hashem is good, and His plan for the world is good. But we cannot see life from the same perspective. So someone facing critical surgery knows that Hashem is in charge, but he can be anxious about he will handle a possible paralysis. A mother knows Hashem will decide, but even with complete trust in Hashem, may she not worry that her son may be killed fighting the Arabs?
We wish for a good and sweet year- good from Hashem and sweet in our eyes.