What is beatitude?
Beatitude is blessedness. God has blessed you. The state of a person who is blessed by the God is blessedness.
Understand from the opposite of it.
The opposite of beatitude is misery.
Misery means being afflicted unwillingly with painful sufferings.
Beatitude is happiness and bliss. It is an attitude toward things that happen in our life on earth. Jesus preached the beatitudes for the Kingdom of Heaven.
While the Beatitudes of Jesus provide a way of life that promises salvation (peaceful and blissful life after death), they also provide peace in the midst of our trials and tribulations on this earth.
( http://www.jesuschristsavior.net/Beatitudes.html )
The Be-Happy Attitudes: Eight Positive Attitudes That Can Transform Your Life
by Robert H. Schuller
Schuller gave very good explanation and illustrations of the use of beatitudes in every day life and happiness.
Some of the Schuller's explanation is available in this document.
Sermon on the Mount - Primer
About Robert Schuller
Be Attitudes - Explanation of each beatitude - Mason United Methodist Church
1. Be poor in spirit - Accept that you are poor in comparison the God. Accept that you are poor in comparison to the society - the universal spirit.
2. Mourning - May be you are mourning - Believe for the best in future
3. Be Meek - Meek is translation for Greek - praotes.
Aristotle defines meekness, praotēs as the mean between orgilotēs,
which means excessive anger, and aorgēsia, which means excessive