In esoteric branches of Hinduism such as Tantra or Western Esoteric occult teachings, they have what is called Right and Left-handed paths towards experiencing Oneness, Enlightenment, or the Higher Self.
Throughout history, the left has always been associated with dark, radical or sinister elements. Even the etymology of the word “sinister” means “from the left side.” Also, in Muslim, Chinese, Judeo-Christian, and even Hindu religions, the left hand is associated with being the unclean side, which is most likely why some of these cultures use it to wipe their … behinds!
These days, the “right-handed path” is what most of us understand to be the pursuit for positive things such as overcoming personal flaws and limitations, purifying our sins, and anything else that helps us connect to our “higher selves.”