Is it permissible to complete the daily learning schedule of Chumash, Tehillim, and Tanya, at night since according to the Arizal (the kabbalist Rabbi Yitzchak Luria of blessed memory,) one must not learn Chumash at night? The Holy One Blessed be He, taught Moses Chumash (Written Torah,) by day, and Oral Torah, (the Talmud,) at night.
There are no hard and fast rules about white shirts. In general, a white shirt is considered to be a modest but respectable garment, and a person should wear clothing that is respectable.
Also, part of the day is spent standing in prayer in front of the Creator, and this certainly warrants respectable attire.
In any case, the main thing is not the external garments, but rather the spiritual ones, namely, a person’s thought, speech, and deed. Physical clothing is only a means to the end, the goal being purity of spiritual garments.
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