Explanation for the selection of Aries & Libra as the respective houses of exaltation and debilation of the Sun

The sign Aries signifying the start of life cycle in the terrestrial world is cardinal, fiery and Tamasik in nature ruled by Mars. In our solar system, the origin of creation is the Sun, the source of the vitality and life energy. Sun signifies brain, soul, origin the entire nerve system, consciousness etc. Aries being the 1^st sign of the Zodiac ruled by Mars signifies head, active energy, strong desire to express the self etc. Therefore, it is quite natural that the characteristics of the Sun will be best expressed in the sign Aries of concordant nature. Again, Sun transits the sign Aquarius in the Bengali month Vaishakha when the Sun shines severe. Again, the lord of the sign Aries is Mars which is designated as the military personnel in the planetary kingdom which is the significator of youth whereas the Sun is described as being middle-aged. Therefore, in order to propagate the knowledge, glory, valour, spiritedness etc. of the Sun, the young planet Mars is fittest and since Mars attains its active for in Aries, the sign of exaltation of the Sun is naturally ascribed to the same.

The 7^th sign of the Zodiac is Libra, cardinal airy sign of Tamas nature and the active field of its ruler Venus. In the 7^th house are judged spouse, desires, attachment to material happiness, lust, total environment etc. Sun is the significator of vital energy, knowledge of the Self, soul, consciousness etc. Therefore, engagement in the environment or physical pleasures automatically leads to destruction of life energy, degradation of consciousness and creation of a Tamasik shield over the soul i.e. in tremendous Tamasik air current, the vital energy of body and the sense of consciousness are destroyed. Therefore, Libra is described as the sign of debilation for the Sun.

Again, due to excessive physical pleasures in contact with the spouse, the creative seed of the native becomes weak or lost. Again, Sun being the origin of the creation has in itself knowledge of Self, Sacred Love etc. but in the active field of the destructive planet Venus i.e. in the sign Libra, the Sacred Love is turned into Tamasik lust which becomes obstacle to attain self realization. As such, the selection of Libra as the sign of debilation of the Sun is quite justified.