According to Buddhism, people are socially naturally classified into two groups.
1. Good People:
People are called good people because they have done good things for themselves and others. Because of those good things, they are happy, and others are also happy for this life and the next life.
2. Bad People:
People are called bad people because they have committed bad doings for themselves and others. Because of those bad doings, they suffer mentally physically and make others suffer as well in this world and the next world. These people namely kill themselves and others socially.
Samdech Preah Mahaghosananda is a Buddhist spiritual teacher who always teaches three essential Dhammas to Buddhists, especially Cambodian Buddhists: Truth, Patience, and Gratitude. These three Dhammas are called Trikod Dhamma.
He is the only one Cambodian monk who most famously devotes for teaching Trikod Dhamma and pilgrimaging for Cambodia Peace.
Whenever he goes, he talks about local and international peace and gives three fruits to the people he meets. The first fruit is to live with Truth. The second fruit is to live with Patience. The third fruit is to live with Gratitude.
These are the top Dhammas of all others.
Buddha brief his all teachings during 45 years of enlightenment into three words: 1. No doing all wrong doings by applying Buddhist disciplines. 2. Doing all good deeds by applying individual duties. 3. Beautifying minds by reducing and eliminating Anger, Greed, and Delusion. This is the teaching of all Buddha.
Unity is a foundation of calmness, peace, and happiness. Buddha always asks Bhikkhu two questions when they go to pay respect Buddha.
The first question is Bhikkhu! can you be patient? and the second question is Bukkhu! are you united?
It means that Buddha wants Buddhists to be patient and to be united for succeeding in calmness, peace, happiness, harmony, and ultimate happiness, Nibbana.