Material civilization needs to become “combined with Divine civilization”

And among the teachings of Bahá'u'lláh is that although material civilization is one of the means for the progress of the world of mankind, yet until it becomes combined with Divine civilization, the desired result, which is the felicity of mankind, will not be attained. (‘Abdu'l-Baha, 'Selections from the Writings of 'Abdu'l-Baha')

We “must emulate the merciful God and turn away from satanic promptings”

Another teaching of Bahá'u'lláh is in relation to universal peace: that all mankind must be awakened to and become conscious of the harm of war, that they should be brought to realize the benefits of peace and know that peace is from God while warfare is satanic. Man must emulate the merciful God and turn away from satanic promptings in order that universal inclination shall be toward peace, love and unity and the discord of war vanish. ('Abdu'l-Baha, The Promulgation of Universal Peace)

The Prophets of God are the “first educators” of humanity

The prophets of God are the first educators. They bestow universal education upon man and cause him to rise from lowest levels of savagery to the highest pinnacles of spiritual development. ('Abdu'l-Baha, Baha'i World Faith)

There should be no extremes in human conditions with respect to “wealth and sustenance”

One of Bahá'u'lláh's teachings is the adjustment of means of livelihood in human society. Under this adjustment there can be no extremes in human conditions as regards wealth and sustenance. For the community needs financier, farmer merchant and laborer just as an army must be composed of commander, officers and privates. All cannot be commanders; all cannot be officers or privates. Each in his station in the social fabric must be competent; each in his function according to ability; but justness of opportunity for all. ('Abdu'l-Baha, 'Foundations of World Unity')

The Manifestation of God for each age is the “real Physician” for all humanity.

Bahá'u'lláh is the real Physician. He has diagnosed human conditions and indicated the necessary treatment. The essential principles of His healing remedies are the knowledge and love of God, severance from all else save God, turning our faces in sincerity toward the Kingdom of God, implicit faith, firmness and fidelity, loving-kindness toward all creatures and the acquisition of the divine virtues indicated for the human world. These are the fundamental principles of progress, civilization, international peace and the unity of mankind. These are the essentials of Bahá'u'lláh's teachings, the secret of everlasting health, the remedy and healing for man. ('Abdu'l-Baha, 'The Promulgation of Universal Peace')

There should be a universal language and script

It beseemeth ... the ... officials of the Government to convene a gathering and choose one of the divers languages, and likewise one of the existing scripts, or else to create a new language and a new scripts or else to create a new language and a new script to be taught children in schools throughout the world. They would, in this way, be acquiring only two languages, one their own native tongue, the other the language in which all the peoples of the world would converse. Were men to take fast hold on that which hath been mentioned, the whole earth would come to be regarded as one country, and the people would be relieved and freed from the necessity of acquiring and teaching different languages.... (Baha’u’llah, ‘Epistle to the Son of the Wolf’)

Every era in our collective life on this planet has its own special Divine spirit. The spirit for our current “illumined” era lies “in the teachings of Baha’u’llah”

For every era hath a spirit; the spirit of this illumined era lieth in the teachings of Bahá'u'lláh. For these lay the foundation of the oneness of the world of humanity and promulgate universal brotherhood. They are founded upon the unity of science and religion and upon investigation of truth. They uphold the principle that religion must be the cause of amity, union and harmony among men. They establish the equality of both sexes and propound economic principles which are for the happiness of individuals. They diffuse universal education, that every soul may as much as possible have a share of knowledge. They abrogate and nullify religious, racial, political, patriotic and economic prejudices and the like. Those teachings that are scattered throughout the Epistles and Tablets are the cause of the illumination and the life of the world of humanity. (‘Abdu’l-Baha, ‘Selections from the Writings of 'Abdu'l-Baha’; The Compilation of Compilations, Vol.III, Cultural Diversity in the Age of Maturity)

"Truthfulness is the foundation of all human virtues"

Truthfulness is the foundation of all human virtues. Without truthfulness progress and success, in all the worlds of God, are impossible for any soul. When this holy attribute is established in man, all the divine qualities will also be acquired. (‘Abdu’l-Baha, quoted by Shoghi Effendi, ‘The Advent of Divine Justice’)