For eg:-
Goswami Tulsidas-Ji in his Ramcharitmanas says-
बिनु सत्संग विवेक न होई। रामकृपा बिनु सुलभ न सोई।।
Without satsang, discrimination is not awakened and without Rama's grace it's not possible to hear satsang.
So what are the other ways other than Satsang for acquiring viveka?