Why chastity has always been considered as highest virtue?

In the book, ‘Brahmacharya – Celibacy Attained with Understanding’, Param Pujya Dada Bhagwan, an Enlightened being, has shown the beneficial effects of brahmacharya with scientific exactness. Let’s look at the following excerpts from this book:rnParam Pujya Dadashri, herein, says: “So many people ask me, ‘What is there in sex that my whole body feels like dead after experiencing the pleasure of sex, my mind dies and my speech dies?’ I tell them that these people, indulging in sexuality, are already dead, but because you are not awakened to this fact, this condition occurs again and again. Otherwise, if ever brahmacharya is preserved, each human being has so much energy. The knowledge of the Self is the ultimate essence of time (samaysaar). This is real awareness that increases the experience of the Self. And brahmacharya is the essence of the living body. After earning merit karmas over countless lives, one attains birth in a family with good culture and high moral standing. But all this is lost in pursuit of illicit sex and money. It is a real wonder that humans are stuck in the terrible filth of exploitation of the five senses. It is horrible heap of filth. Mind, intellect, consciousness (chitt) and ego should remain in brahmacharya. And if mind, intellect, consciousness and ego turn towards brahmacharya, then the external sexuality will shed off automatically. Turn your mind, intellect, consciousness and ego. The presence of brahmacharya in the mind, the body and the speech results in wonderful power of mind, wonderful power of body and wonderful power of the speech. What type of sexuality existed in the times of Lord Mahavir? The sex was limited to having one to two children. The Lord knew that this interaction would be abused in this day and age, so he had to add the fifth vow of brahmacharya. The person who is under the vow of brahmacharya will never fall, no matter how bad the difficulties. That is called safe side. Brahmacharya is the king of the body. A person practicing brahmacharya has a wonderful mind. Brahmacharya is the extract of the entire living body. What I am saying is that once the opinion about sex changes, sex does not remain! As long as the opinion about sex does not change, the energy of the semen does not rise higher. And here, in Akram (Akram Vignan, founded by Param Pujya Dada Bhagwan), we make a direct entry in to the Self (the pure Soul within), and that is what we call rising higher. The cessation of sex leads to the experience of the bliss of the Self. This then leads to the natural rise of the vitality of the conserved semen. Only the one who is absolutely free from all impulses of sexuality has the energy and power of words that totally purges sexuality. The thoughts of sex and abrahmacharya will come, but when one keeps praying for attaining the energy of brahmacharya, it is highly commendable. With these prayers, the seeker will attain the goal over a variable period of two to five years. The person, who conquers abrahmacharya, conquers the whole world. The governing deities, the celestial protectors of the path of liberation are very pleased with the one who is in brahmacharya! To practice (chastity) is indeed doer-ship. And the fruit of this doer-ship will be samyak (right) merit deeds in the next life. It means that in your next life, you will receive whatever you wish without any difficulty, and with the same ease, you will attain moksha (ultimate liberation. You will have the darshan of (be able to see) Tirthankar (the highest state of a human being, seeing whom we attain liberation) and you shall also get a chance to stay next to the Tirthankar. There (near the Tirthankar), all your circumstances will be very wonderful!”