Be happy
The phrase 'Sei glücklich' is the German translation of 'Be happy'. It is used in the same way as the English phrase, to express a desire or hope that someone will be happy. It can also be used as a command, telling someone to be happy.
Be happy, life is short
This phrase is used to remind people to enjoy their lives because they are fleeting. It's often used to console someone who is feeling down or to remind someone not to take their life for granted.
Despite your problems, be happy
This phrase is commonly used to encourage people to remain optimistic even when faced with difficulties. It is often spoken by people who are trying to cheer up a friend or loved one who is dealing with troubles.
Be happy and laugh a lot
This phrase is similar to the English saying, 'laughter is the best medicine', and is often used to remind people of the health benefits of laughter. It is usually used in positive, uplifting contexts, such as messages in greeting cards or inspirational quotes.