There are various kinds of sacrifices that will be examined later on, but we should understand that the ultimate goal of all sacrifices is to please the Supreme Godhead, Viṣṇu. During our material existence, we have to deal with material objects, if only to keep body and soul together. But in all such material activities we can evoke the spiritual atmosphere, in terms of the Vedantic truth that the Supreme Spirit is omnipresent. This truth is imperfectly explained by the proponents of pantheism, the misconception that everything is the Supreme Spirit simply because the Supreme Spirit is everywhere. Once this misconception is cleared up and if we remember that the Supreme Spirit is indeed omnipresent, we can create a spiritual atmosphere by performing all our activities in relation to the Supreme Spirit, with everything directed by one who is a self-realized soul. Then the whole thing is transformed into spirit.
An example may be given here to illuminate the above process of spiritualization. When the iron is put into the fire and becomes red hot, the iron then develops the qualities of fire and stops functioning as iron. In the same way, when all our activities are done in terms of our relationship with Kṛṣṇa, then everything is surcharged with spiritualization. Because pleasing Kṛṣṇa has become our ultimate goal, all our activities have become spiritual activities. In a sacrifice there are five primary elements—namely, (1) the process of offering, (2) the offering itself, (3) the fire, (4) the sacrifice, and (5) the result of the sacrifice. When all of these elements become related with the Supreme Spirit, all of them become spiritualized; and at that time the whole thing becomes really a sacrifice. So when offered to the transcendental service of Śrī Kṛṣṇa, all the above-mentioned five elements become interrelated with Him, and thus they become totally spiritualized.
Therefore, learned men perform all their activities for transcendental results and thus direct all their activities toward the transcendental service of the Personality of Godhead. These genuinely purified souls actually control all their sensory activities and also master their true, spiritual self. Such spiritualized persons alone can show actual sympathy to the fallen in terms of the individual, the place, and the time. And in spite of performing apparently material activities, such spiritualized persons are free from the bondage of work. This process is explained in the seventh verse of the fifth chapter of Bhagavad-gītā: "Householders who perform their work with a view to transcendental results, out of sympathy for all others, are really eligible to become public leaders. All others who claim to be public leaders are mistaken."
The enemies of the karma-yogīs—who generally perform all works for self-satisfaction or sense gratification, and who are not in touch with the Supreme Spirit by the transcendental relationship of service—sometimes pose themselves as working according to the desire of the supreme will. As a matter of fact, they are pantheist pretenders, trying to cover their extravagancy by falsely labeling it transcendental service to Godhead. But those who are pure in heart—that is, those who have surrendered everything unto the lotus feet of the Personality of Godhead—remain aloof and separate from such easygoing pseudo transcendentalists, while giving them all respects that they may demand.
Such pure-in-heart transcendentalists know that although the living entity is very insignificant, he is part and parcel of the Absolute Truth and so has a proportionate measure of independence. And although the Personality of Godhead is all-powerful, He never interferes with this little freedom that the living entity enjoys. Thus the living entity sometimes becomes conditioned by the modes of nature, simply by abusing his small measure of independence that he is entitled to enjoy. When he becomes conditioned by nature's modes of goodness, passion, or ignorance, he develops those respective qualities of goodness, passion, and ignorance. As long as the living entity remains conditioned by material nature, he has to act according to his particular mode of nature. If these modes were not acting, then we would not have observed in the phenomenal world different varieties of activities. These different varieties of activities are conditioned by the different modes of nature.