BG 4.33-35
Better than the sacrifice of any objects is the sacrifice of wisdom, O Parantapa. All actions in their entirety, O Pârtha, culminate in wisdom. Learn thou this by discipleship, by investiga tion, and by service. The wise, the seers of the essence of things, will instruct thee in wisdom. And having known this, thou shalt not again fall into this confusion, O Pândava; for by this thou wilt see all beings without exception in the Self, and thus in Me.