Chasidut for Rosh Hashanah 53:15

And therefore, when we are waking from sleep, we must wash our hands with water. Water represents knowledge, as in, "the earth will be filled with knowledge as the waters cover the sea bed". Isaiah 11:9. We must evoke the waters of knowledge to evoke order and banish impurity, which is attached to disorder, which has become attached to the hands. The entire power of the forces of evil is only from disorder, when a person is not receiving perfect sustenance from order. This is represented by the darkness of night, by sleep, when the body, which corresponds to night, remains without sustenance from the intellect, which corresponds to day. During this time, the forces of evil are sustained from there, from disorder, become attached specifically to the hands. This is because the above rectification of binding and bridging disorder into order is represented by the Yud, which corresponds to the Kaf, which represents the hands, as in, 'you formed me backward and forward and placed your hand upon me', as brought on the verse "Open your hand". The entire world compared to G-d is in the category of disorder. G-d is exalted beyond all spiritual worlds, and all the worlds are in disorder before Him, since all the worlds are guided by Malchut as explained in the lesson as mentioned above, and the Malchut corresponds to disorder, and said above. This corresponds to "the world was created in the month of Tishri". Rosh Hashanah 27b. Tishri represents tav-shin-resh-kuf, disorder, Malchut. The world was created mainly so that we come to know G-d Zohar II 42B, so that we acquire perfect knowledge, which is knowing G-d. That is the true essence of knowledge, and only that is considered knowledge, as written, "you shall know today and restore to your heart that G-d is the Lord". Deuteronomy 4:39. The main purpose of creation was to bring disorder into order, to elevate all worlds to their root, so that disorder, representing the totality of all worlds, will become brought into order, which is knowledge, specifically the knowledge of G-d. That is the main purpose and what will remain at the very end. Everything else will become nullified into it. But how does one achieve this, binding and elevating all worlds corresponding to disorder, to the roots, into order, which is wisdom and knowledge? This is only possible in this world of action, by means of observing the practical commandments of the Torah. The Torah, as a whole, is held in the hands, which are the tools of action, as in "today to do them". Deuteronomy 7:11. This is alluded in "the two tablets of the covenant are in my two hands". Deuteronomy 9:15. Torah, represented by the two tablets of the covenant, is held within the two hands, which represent the tools of action, for the hands place all things where they are needed. This is true regarding the world as a whole: by means of the hands, the tools of action corresponding to the totality of the Torah, we take all the worlds, corresponding to disorder, elevating them and bringing them to G-d, so that they are absorbed within their root in order. This is why the Zohar tells of Rabbi Eliezer who lifted his two hands as he was about to die and said "woe that two Torahs are about to disappear from the world". Zohar I 99a. The two hands represent the totality of the Torah, represented by the written Torah and the oral Torah, which is why holiness is evoked mainly through the sanctity of the hands. This is represented by the washing of the hands in the morning. When we sleep, the life sustenance disappears and the forces of evil that are attached to disorder become attached specifically to the hands, for they are always seeking to be nourished from holiness. And since holiness – bringing all worlds to the root, bringing disorder into order - is by means of the hands, the main attachment of the forces of evil that always seek division and to separate disorder from order is specifically to the hands, the main site of sanctity. The hands are the main tools by means of which we are able to bind and elevate disorder into order, and therefore, they are also the main place where the forces of evil are attached. That is why we must wash our hands with water immediately upon awakening, to evoke the waters of knowledge and evoke order, so that the forces of evil attached to disorder will be banished. This is what our Sages said, "the evil spirit that rests on the hands as a princess and is particular not to leave unless the hands are washed properly". Shabbat 109a. This force of evil is rightly called a princess, for it is attached to a blemish of the Malchut caused by separating Malchut and saying 'I shall rule', which causes everything to be disordered, which is the source of judgments and evil forces. That is why it is called a princess.