A person can put the Oneness of Hashem into his mind through practice, thinking a good deal about how the whole world cooperates to do the will of Hashem... This is a visualization of the thought that Hashem is One. If a person follows that approach, visualizing a concept and thinking about it frequently, it ultimately becomes part of his permanent mindset. — Ohr Avigdor Hakdama
Wealth does not mean happiness. A person can be intensely unhappy despite wealth, because happiness doesn’t depend on any circumstances except on the frame of mind...
Rich or poor has nothing to do with happiness. It’s a great error that poor people make, thinking if they had money they would be happy. But it doesn’t even begin to be true. — Under Good Influence (#332)
Every street is Sunshine Road. The Good Mind supplies the sunshine. Happiness is not a place; it is the Torah-mind, which makes all places happy. — Sing, You Righteous
“Ivdu es Hashem b’simcha — serve Hashem with Happiness” (Tehilim 100:2).
[People make] a mistake in the simple meaning. Of course you have to serve with simcha. But what does it mean with simcha? You have to serve with the simcha, with the fact that you’re happy. That’s the way to serve Hashem. When you have everything, why [don’t] you serve Hashem with that happiness and say to Him “Thank You Hashem!” — World and Torah (#199)
We have to know that there’s a dread of Hashem. This includes the fear of facing Him in the World to Come, coming face-to-face with Him, the greatest dread of all. One of the functions of this dread is to think of Gehinom. Every Jew must train himself to put into his thoughts as a permanent addition that there is a fearsome Gehinom going on all the time. — Fundamental Principles (#E-201)
The Torah commands practices that work against the desires of the body. Yom Kippur offers us this glorious additional achievement [fasting], Besides the fact that we do teshuvah (repentance) and besides the fact that we do mitzvos all day. The fact that we restrain ourselves from eating for over twenty-four hours is a victory of mind over matter. — Ohr Avigdor Shaar Avodas Elokim
Imagine a neshama (soul) went to the next world with stains on it. It applied to enter Gan (the Garden of) Eden. But the malach (angel) who’s standing there said, "Nothing doing! You have stains on you! First go and cleanse yourself." So the neshama had to nebach (pity!) go to Gehinom. I don’t want to describe what’s happening in Gehinom. No words we have are sufficient to describe it. — The Best Day of the Year (#933)
"Without the Gehinnom, this world would not be a world of Kindliness. Should the tyrant who murdered millions of innocent men be permitted to swallow a perfumed poison and escape painlessly? Kindliness to the victims requires that the blood of each one should be fully avenged. The Gehinnom is thus essential in a world of Kindliness, Purpose and Wisdom. — Rejoice, O Youth
On Yom Kippur, we’re speaking only to Hashem. We’re asking Him to give us all these things. You’re educating yourself in bitachon, trusting only in Him. The more you think on Yom Kippur of this great principle that all you want comes only from Him, the more He’ll reward your trust. — Best Day of the Year (#933)
Realize what a great miracle teshuva (repentance) is: To undo the past, to wipe out what happened before, is something we cannot understand. It is a miracle that teshuva helps, and for this miracle we’re expected to be grateful to Hashem. — Gift of Teshuva (#608)