And this is clear: a power above and beyond the powers of nature must needs be brought to bear, to change this black darkness into light, and these hatreds and resentments, grudges and spites, these endless wrangles and wars, into fellowship and love amongst all the peoples of the earth. This power is none other than the breathings of the Holy Spirit and the mighty inflow of the Word of God.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 52

Now is the dawn of universal peace; my hope is that its morn will fully break, converting the gloom of war, of strife and of wrangling among men into the light of union, of harmony and of affection.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 311-312

They must in every matter search out the truth and not insist upon their own opinion, for stubbornness and persistence in one's views will lead ultimately to discord and wrangling and the truth will remain hidden.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, p. 88