Musar su Isaia 26:2

And now, if we come to the count, let a man reflect upon the great zeal he should devote to this; that is, to strengthen himself and to pray with a minyan each day. For from one day alone, from the prayers of shacharith and minchah, he has thirty-eight Amens from nineteen blessings of prayer [i.e., the Amidah], respectively [(And our sages of blessed memory have said (Shabbath 119b): "If one is careful in the answering of Amen, the gates of Gan Eden are opened for him, as it is written (Isaiah 26:2): 'Open, you gates, and let there enter a righteous nation, keeper of emunim [faith].' Read it not "emunim," but "Amenim."'")], and eight times "Amen, yehei shemei rabbah," and another sixteen Amenim from the Kadishim and two Kedushoth and Barchu.

And in Parshath Pinchas: "If one toils in Torah, he merits the opening of many gates before him in this world, and many lights. When he departs from this world, it [Torah] precedes him and goes to all the keepers of the gates and calls out and says (Isaiah 26:2): 'Open, you gates, and let the righteous nation enter.' 'Prepare a seat for Ploni, servant of the King.' For there is no rejoicing for the Holy One Blessed be He except in one who occupies himself with Torah — how much more so, one who stays awake at night to occupy himself with Torah. For all the tzaddikim in Gan Eden listen to his voice, and the Holy One Blessed be He prides Himself in him."

The Holy One blessed be He desires only faithfulness (honesty). In regard to this scripture states: "G-d guards those who are faithful" (Tehilim 31:24), and "Open the gates and let the righteous people that keep faith enter in" (Isaiah 26:2), and "My eyes shall be on the faithful of the land so that they may dwell with Me" (Tehilim 101:6), and "are Your eyes not to faithfulness?" (Jeremiah 5:3).

Also, since one is prone to forgetfulness in these fine details, he will need diligent study in the books explaining these fine details to renew remembrance of them in his mind. Then certainly, he will be roused to fulfill them.

However, the factors which cause loss of this trait are all those detriments to the trait of Watchfulness, in addition to lack of proficiency in knowledge of the laws and ethics (Mussarim) as I wrote above. Our sages already stated: "an ignorant man cannot be pious" (Avot 2:5). For one who does not know cannot possibly do. Likewise they taught "great is study in that it brings one to doing" (Kidushin 40b).