I may approach the answer in different way
Be always happy
- Be qualifies you
- Hence the sentence is
- You,be always happy.
- You keep your inner temperament in a happy disposition.
- This would help you to make a good friend, philosopher and guide to others.
- They would seek/look for your company always
Always be happy
- Be qualifies happy
- Whatever be your inner temperament , you should keep and practice happy disposition while handling others.
- Happy becomes a qualifier to ensure that your inner stress does not affect others happiness.
This is my personal view based on lateral thinking.
Not a Grammar driven rule. – Chandrasekaran Avanavadi Sundaram Iyer
