Gemara:

Moed Katan 

Halacha:

Tefillah,  Yom Kippur 

Machshava:

Spirituality,  Tefillah,  Yom Kippur 

Mishna:

Moed Kattan 

References: Moed Katan: 19A  

Description

Yom Kippur can be a Yom-Tov and paradise,, where we reach the highest level a human-being can spiritually, or it can be a living purgatory on earth. It actually depends how you live and what you aspire to all year long