abhyasa vairagyabhyam tat nirodhah
This is Yoga Sutra 1.12, and I hope I can respectfully do it justice as I attempt to navigate its many intricacies.
There are three concepts introduced in this saying: abhyasa (practice), vairagya (non-attachment) and nirodah (self-mastery). Before explaining, note the first two must work in tandem to lead to the third. The basic idea is that practice without attachment can decrease the fluctuations of the mind, which is the ultimate path to enlightenment.
Read the full article here: https://byrslf.co/humble-yoga-philosophy-a-non-experts-interpretation-of-yoga-sutra-1-12-3cd47d55c67