अश्रद्धया हुतं दत्तं तपस्तप्तं कृतं च यत्।असदित्युच्यते पार्थ न च तत्प्रेत्य नो इह ॥

Asat That which changes form and has no permanent existence. It does not mean nonexistence as such.Acts of sacrifice, austerity and gift that are performed without faith, under pressure, or to prevent some sort of trouble or to gratify a craving, are Asat in their nature. They yield no permanent benefit or fruit to anybody.Any sacrifice, austerity or gift done without dedicating it to the Lord will be of no avail to the doer in this earthly life here or in the life beyond hereafter. It would be as useless as showers of rain falling on rocky ground or pouring oblations of ghee (clarified butter) on cold ashes. If you have no faith you will become egoistic and obstinate. Your heart will become hard. If you perform even hundreds of sacrifices without faith, without the spirit of selfsurrender to the Lord, even if you distribute the wealth of the whole world in charity without faith in and devotion to the Lord, all these would be worthless and useless. The sages will not appreciate such sacrifices or gifts. Energy, money and time are simply wasted.