The reason given in the Shoah and the rulings is because we cannot protect our bodies according to the law of all that is necessary to protect when putting on tefillin.
But this reason is not enough, because according to this, those who can guard their bodies are obligated to wear them all day, as the interpretation of the halakha concludes, and it is clear that many of us can guard our bodies and according to law are obligated to wear tefillin all day, and as I heard Gitman, one of the authors of the book Zichron Eliyahu] because the Grisha and the Gerhap Shainberg instructed, according to the commentary to the above-mentioned halacha, that those who can keep their bodies should lay them down all day long.
And it is necessary to specify the example of someone who is unable to lay them down all day but only part of the day, if indeed he passed away with the laying down of Kash and prayer only. The last ones are that those who cannot put them down until the end of the prayer, but a little before, according to the lessons that were brought there, should take them off already then, and according to the words of the judges, "everything according to what a person is".
However, what should be noted about this is that the ancient Davshanim did not put on tefillin at all, as is explained by Hedia in the 2013 edition of Emanuel, that in their time they would only put on tefillin in two Yeshivas, and there are other sources for the fact that there were situations where they did not put on tefillin, and Yaoi in Tashov Rashba and Meiri, and Yaoi In my first words about the Yerushalmi, there are blessings on R. Yanai 3 days after his illness, etc.
This is a custom that took root a long time ago when they did not put on tefillin 2000, and also that in their time there were righteous people who put on all day long, but in fact things have been equalized over the generations that put on tefillin in the 17th of the 18th century and among the peoples of the land.
It should be noted another model of the tzitzit, in ancient years it was not customary to wear a tzitzit all day, and one of the followers of the world in ancient years would strive to be rooted in the world to wear a small tallit all day long, and in the name of the Gra there is a rumor that it would have been appropriate to make such an effort in tefillin if he had his times in his hand, and he would follow the instructions and leaderships and crown A head for a student of Rabbi Mulajin.
And the reason I don't wear a tefillin all day, and it turns out, is the reason that many of my number do so, is because it may cause more harm than good, because today there is a kind of disconnection from the public framework, as we know that all the strengthening of Torah in the world today is due to the creation of a strong public framework, and Anyone who wants to receive from this framework must be a part of it, and as I have heard, it is also in the name of Garbad Diskin that the reason is not to wear light blue because the damage is more than the profit and tax.
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