Tosefes in Rashi: I will not use the name Kah ¹ any more.

Radak citing Rav Sadya Gaon: This is thanks. Seeing Hashem is thanking and praising Him, and pondering His ways.

Radak citing his father: I will not see the dwelling of Kah, i.e. the Beis ha'Mikdash.

Malbim: As long as the intellect is tied to the body, it is bound by limitations of the body, e.g. time and location. These are not limitations if intellect itself, just like lenses are not essential for healthy vision, only for impaired eyes. When the Nefesh separates from the body, it will not recognize Hashem like it did while in Eretz ha'Chayim. There, Hashem creates within time and space, with order and continuation, and cause and effect. After death, the intellect does not know of time and sensory perception. Rather, it understands things as they are. We cannot picture this now, just like a blind person cannot picture colors and appearances.

Tosefes in Rashi: The living may use [Shem Kah], but the dead may not - "Lo ha'Mesim Yehalelu Kah" (Tehilim 115:17). It is a statute; they may not use the name of two letters.

Rashi: It is the Beis ha'Mikdash. Radak citing his father - this is the Perush of Lo Er'eh Kah, i.e. in this world, which has two Re'iyos - of the heart (understanding), and of the eye - "Lo Abit Adam."

Malbim: Refer to 38:11:1:4.

Rashi: I will not see a living person [again].

Malbim: [After death, my intellect] will not perceive people [or anything else physical].

Rashi: When I will be with the dead in the ground, withheld from the living.

Radak: It is those who dwell in this world, which is called Chadel and Cheled. (These are the same, just the letters are re-arranged, like) Keves and Kesev.

Malbim: Refer to 38:11:3:2.