Indeed, all on earth know that an upright character is
praiseworthy and acceptable and that baseness of character is blameworthy and
rejected, that justice and fairness are favoured and agreeable whilst cruelty
and tyranny are unacceptable and rejected. Notwithstanding this, all people,
but for a few, are devoid of a praiseworthy character and bereft of a sense of
justice.
The power of conscience is therefore needed, and spiritual
sentiments are required, that souls may feel compelled to evince a goodly
character. It is our firm belief that the power of implementation in this great
endeavour is the penetrating influence of the Word of God and the confirmations
of the Holy Spirit. 
- ‘Abdu’l-Baha  (From the FSecond Tablet to the Hague, 1 July
1920; revised translation under the direction of the Universal House of
Justice, available at the online ‘Baha’i Reference Library’ site of the Baha’i
World Center)