Pilgrimages, sacrifices, the various programs of the Bhakti Marga, physical practices such as Asana and Pranayama, severe tapascharya, Guru Seva, etc. are all for making the seekers mind subtle enough to peep over the limited vision of life to the farthest beyond.
Austerity redeems the personality in the seeker from its inertia; Brahmacharya relieves our psychological and intellectual debilities; and faith sharpens the intensity at and the sincerity in meditation. Without these three, life in the spiritual path cannot be ever graced with full and easy success.
Austerity is mainly for the discipline and control of the body; Brahmacharya is essentially a discipline of the mind; and faith necessarily is an adjustment in the intellectual sheath.