Siman 155

We learn at the end of Berakhot: Anyone who leaves the beit knesset and enters the beit midrash and engages in Torah—merits and receives the Divine Presence, as it is said: "They go from strength to strength, every one of them appears before God in Zion." Therefore, after the prayer, one should establish a fixed time to study Torah. And he should not let the time pass even if he believes he will profit much, and he should believe in Hashem that He will give him his reward and he will not lose out by means of Torah. And whatever was decreed for him to profit—he will profit. And the beginning of a person's judgment is only over matters of Torah (Sanhedrin 7a). And when they bring a person in for judgment, they ask him: Did you conduct your business faithfully? Did you establish fixed times for Torah (Shabbat 31a)? And even one who does not know how to study should go to the beit midrash, and the reward for walking is in his hand. Or he should establish a place for himself and study a little of what he knows, and reflect upon his affairs to see and examine what he does, and if there is an aspect of transgression in it, he should withdraw from it. And by means of the Torah, fear of Heaven will enter his heart. And the Torah is a tree of life. And without the Torah there is nothing good in the world, and everything is vanity and a striving after wind.

And even if it is necessary for him to go out for a very urgent matter – he should learn one verse or one halacha. And before he goes to the beit midrash, he may eat breakfast if he is accustomed to it, and it is good that he should be accustomed to it. And our sages, of blessed memory, said that breakfast brings much health to the body. And they said (Bava Metzia 107b) that eighty-three illnesses depend on the gallbladder, and breakfast nullifies them all. And thirteen things were said regarding breakfast: it saves from the heat, and from the cold..., and sixty runners may run and not reach the man who ate in the morning. And the rabbis said: Rise early and eat in the summer because of the heat, and in the winter because of the cold. And it is written: "And you shall serve the Lord your God" – this is the recitation of Shema and prayer, "and He shall bless your bread and your water" – this is bread with salt and a pitcher of water. From this point forward: "and I will remove illness from your midst." (And that which they said that breakfast is only with grain far from a settlement..., the Magen Avraham wrote well that the one who heard, heard and erred, as it refers to a "puta" in Shabbat 66b. And he erred to say it regarding "pita," see there. So it is explicitly in Shabbat ibid.)