“Therefore, thoughts must be lofty and ideals uplifted in order that the world of humanity may become assisted in new conditions of reform. When this reformation affects every degree, then will come the very Day of the Lord of which all the prophets have spoken. That is the Day wherein the whole world will be regenerated. Consider: … Transportation in the former ages was restricted to conveyance by animals. How would it provide for human needs today? If modes of transportation had not been reformed, the teeming millions now upon the earth would die of starvation. …It is also true of other things which have been reformed in proportion to the needs of the present time. Had they not been reformed, man could not find subsistence.

If these material tendencies are in such need of reformation, how much greater the need in the world of the human spirit, the world of human thought, perception, virtues and bounties!”

– ‘Abdu’l-Bahá, The Promulgation of Universal Peace