Srila Prabhupada Quote

Even if one distributes ten million cows in charity during an eclipse of the sun, lives at the confluence of the Ganges and Yamuna for millions of years, 
or gives a mountain of gold in sacrifice to the brahmanas, he does not earn one hundredth part of the merit derived from chanting Hare Krishna.
– Sri Chaitanya Charitamrita, adi 3.79, purport