स वा अयमात्मा ब्रह्म विज्ञानमयोमनोमयः प्राणमयश्चक्षुर्मयः श्रोत्रमयः पृ-थिवीमय आपोमयो वायुमय आकाश-मयस्तेजोमयोऽतेजोमयः काममयोऽकाम-मयः क्रोधमयोऽक्रोधमयो धर्ममयोऽधर्म-मयः सर्वमयस्तद्यदेतदिदंमयोऽदोमय इ-ति यथाकारी यथाचारी तथा भवतिसाधुकारी साधुर्भवति पापकारी पापोभवति पुण्यः पुण्येन कर्मणा भवति पापःपापेन ।अथो खल्वाहुः काममय एवायंपुरुष इति स यथाकामो भवति तत्क्रतु-र्भवति यत्क्रतुर्भवति तत्कर्म कुरुते य-त्कर्म कुरुते तदभिसंपद्यते ॥ ५ ॥
In plain words
This self you are asking about is nothing less than Brahman itself — woven through with understanding, mind, breath, sight, hearing, with earth, water, wind, and space, with heat and its absence, with wanting and not-wanting, with anger and its absence, with right conduct and wrong. It is made of everything there is, this and that alike. And here is the law running underneath it all: you become what you do and how you live. Act well, and you become a good person. Act badly, and you become a bad one. Virtuous action makes you virtuous; sinful action makes you sinful. There are others, though, who put it more simply: a person, they say, is nothing but desire. Whatever you desire, that becomes your resolve. Whatever your resolve, that becomes your action. And whatever action you take — that is exactly what you become.
Close to the Sanskrit
This self, verily, is Brahman — consisting of understanding, mind, breath, sight, hearing; consisting of earth, water, wind, space; consisting of fire and of non-fire; of desire and of non-desire; of anger and of non-anger; of righteousness and of unrighteousness; consisting of everything — that is what is meant by 'consisting of this and consisting of that.' As one acts, as one conducts oneself, so one becomes: the doer of good becomes good, the doer of evil becomes evil; one becomes holy by holy action, sinful by sinful [action]. Now, indeed, others say: this person consists of desire alone. As is his desire, so is his resolve; as is his resolve, that action he performs; whatever action he performs, that he attains.