Four more forms of yajna, each suited to a different kind of seeker. Those with wealth offer through charitable giving. Those with physical endurance practice austerity. Those inclined toward discipline pursue yogic sadhana. Those drawn to learning make their study and pursuit of knowledge the offering. All are firm in their commitment.
The underlying message is generous: sadhana is not one-size-fits-all. A farmer offers through the sweat of his labor. A teacher offers through the sharing of knowledge. A generous person offers through giving. Each contributes according to their nature and capacity — and each contribution is a valid yajna.