BAHA'O'LLAH declares the absolute equality of the sexes. The male and female in the mineral, vegetable and animal kingdoms share alike the material bestowals. Why should there be a  difference in the human kingdom? Verily, they are equal before God, for so he created them. Why should woman be deprived of exercising the fullest opportunities offered by life? Whosoever serves humanity most is nearest God -- for God is no respecter of gender. The male and female are like the two wings of a bird and when both wings are reinforced with the same impulse the bird of humanity will be enabled to soar heaven-ward to the summit of progress.

‘Abdu’l-Bahá, Divine Philosophy, p. 82-83

In the estimation of God there is no gender. The one whose deeds are more worthy, whose sayings are better, whose accomplishments are more useful is nearest and dearest in the estimation of God, be that one male or female. When we look upon creation, we find the male and female principle apparent in all phenomena of existence. In the vegetable kingdom we find the male and female fig tree, the male and female palm, the mulberry tree and so on. All plant life is characterized by this difference in gender, but no distinction or preference is evidenced. Nay, rather, there is perfect equality. Likewise, in the animal kingdom gender obtains; we have male and female, but no distinction or preference. Perfect equality is manifest.

‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 374