To me, the following quote from Baha'u'llah is the definition of success:
"Be fair to yourselves and to others, that the evidences of justice may be revealed, through your deeds, among Our faithful servants. Beware lest ye encroach upon the substance of your neighbor. Prove yourselves worthy of his trust and confidence in you, and withhold not from the poor the gifts which the grace of God hath bestowed upon you. He, verily, shall recompense the charitable, and doubly repay them for what they have bestowed. No God is there but Him. All creation and its empire are His. He bestoweth His gifts on whom He will, and from whom He will He withholdeth them. He is the Great Giver, the Most Generous, the Benevolent."
- Baha'u'llah, (Gleanings from the Writings of Baha'u'llah, p. 277)