We should “cling to those things which prove to be the cause of happiness” for humanity

You must cling to those things which prove to be the cause of happiness for the world of man. You must show kindness to the orphans, give food to the hungry, clothe the naked and offer help to the poor so that you may be accepted in the Court of God. (Words of ‘Abdu’l-Baha, Montreal, September 6, 1912; Mahmud’s Diary)

A universal language should be adopted which can be acquired by all so that all people will be able to communicate

… a universal language is necessary. A language should be adopted which can be acquired by all. Every person will have to learn two languages -- one, his own, and the other, universal, so that all persons will have a means of communication. This will cause the removal of misunderstandings among the various nations. All worship one God and all are the servants of the one God. Differences occur when people cannot understand one another. When they can talk in the same language, differences due to misunderstandings will melt away, while love and harmony will have their sway. The East and the West will then join hands and unite with each other in bonds of union. (Words of ‘Abdu’l-Baha, First public talk in Canada, September 1, 1912, Mahmud’s Diary)