Sin

O Heedless Ones! Think not the secrets of hearts are hidden, nay, know ye of a certainty that in clear characters they are engraved and are openly manifest in the holy Presence.

Bahá’u’lláh, Hidden Words, Persian 59

Pleasant is the realm of being, wert thou to attain thereto; glorious is the domain of eternity, shouldst thou pass beyond the world of mortality; sweet is the holy ecstasy if thou drinkest of the mystic chalice from the hands of the celestial Youth. Shouldst thou attain this station, thou wouldst be freed from destruction and death, from toil and sin.

Bahá’u’lláh, The Persian Hidden Words 70

Say: It behoveth every one that holdeth fast to the hem of Our Robe to be untainted by anything from which the Concourse on high may be averse. Thus hath it been decreed by thy Lord, the All-Glorious, in this His perspicuous Tablet.

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 307

Say: Set ye aside My love, and commit what grieveth Mine heart? What is it that hindereth you from comprehending what hath been revealed unto you by Him Who is the All-Knowing, the All-Wise?

Bahá’u’lláh, Gleanings from the Writings of Bahá’u’lláh, p. 307

Should anyone be afflicted by a sin, it behoveth him to repent thereof and return unto his Lord. He, verily, granteth forgiveness unto whomsoever He willeth, and none may question that which it pleaseth Him to ordain. He is, in truth, the Ever-Forgiving.

Bahá’u’lláh, The Kitáb-i-Aqdas, p. 37

The source of error is to disbelieve in the One true God, rely upon aught else but Him, and flee from His Decree.

Bahá’u’lláh, Tablets of Bahá’u’lláh, p. 156