Supreme happiness is man’s...if...

How long shall we drift on the wings of passion and vain desire; how long shall we spend our days like barbarians in the depths of ignorance and abomination? God has given us eyes, that we may look about us at the world, and lay hold of whatsoever will further civilization and the arts of living. He has given us ears, that we may hear and profit by the wisdom of scholars and philosophers and arise to promote and practice it. Senses and faculties have been bestowed upon us, to be devoted to the service of the general good; so that we, distinguished above all other forms of life for perceptiveness and reason, should labor at all times and along all lines, whether the occasion be great or small, ordinary or extraordinary, until all mankind are safely gathered into the impregnable stronghold of knowledge. We should continually be establishing new bases for human happiness and creating and promoting new instrumentalities toward this end. How excellent, how honorable is man if he arises to fulfil his responsibilities; how wretched and contemptible, if he shuts his eyes to the welfare of society and wastes his precious life in pursuing his own selfish interests and personal advantages. Supreme happiness is man’s, and he beholds the signs of God in the world and in the human soul, if he urges on the steed of high endeavor in the arena of civilization and justice.

'Abdu'l-Baha, The Secret of Divine Civilization, p. 3

Educating Children

Let the mothers consider that whatever concerneth the education of children is of the first importance. Let them put forth every effort in this regard, for when the bough is green and tender it will grow in whatever way ye train it. Therefore is it incumbent upon the mothers to rear their little ones even as a gardener tendeth his young plants. Let them strive by day and by night to establish within their children faith and certitude, the fear of God, the love of the Beloved of the worlds, and all good qualities and traits. Whensoever a mother seeth that her child hath done well, let her praise and applaud him and cheer his heart; and if the slightest undesirable trait should manifest itself, let her counsel the child and punish him, and use means based on reason, even a slight verbal chastisement should this be necessary. It is not, however, permissible to strike a child, or vilify him, for the child’s character will be totally perverted if he be subjected to blows or verbal abuse.

'Abdu'l-Baha, Selections from the Writings of Abdu'l-Baha, p. 125

The least one could do while traversing this brief span of life...

It behoveth everyone to traverse this brief span of life with sincerity and fairness. Should one fail to attain unto the recognition of Him Who is the Eternal Truth, let him at least conduct himself with reason and justice.

(Baha'u'llah, The Summons of the Lord of Hosts, p. 167)