November 25

No matter how far the material world advances, it cannot establish the happiness of mankind. Only when material and spiritual civilisation are linked and coordinated will happiness be assured. Then material civilisation will not contribute its energies to the forces of evil in destroying the oneness of humanity, for in material civilisation good and evil advance together and maintain the same pace. For example consider the material progress of man in the last decade. Schools colleges, hospitals, philanthropic institutions, scientific academies temples of philosophy have been founded, but hand in hand with these evidences of development, the invention and production of means and weapons for human destruction have correspondingly increased...

All this is the outcome of material civilisation; therefore, although material advancement furthers good purposes in life, at the same time it serves evil ends ... If the moral precepts and foundations of divine civilisation become united with the material advancement of man, there is no doubt that the happiness of the human world will be attained and from every direction the glad tidings of peace upon earth will be announced. Then humankind will achieve extraordinary progress, the sphere of human intelligence will be immeasurably enlarged, wonderful inventions will appear, and the spirit of God will reveal itself; all men will consort in joy and fragrance, and eternal life will be conferred upon the children of the Kingdom. 
('Abdu'l-Bahá, ‘Promulgation of Universal Peace’; The Compilation of Compilations, Vol.III, Social and Economic Development)