J. Robert Oppenheimer said this quote

It is a profound and necessary truth that the deep things in science are not found because they are useful, they are found because it was possible to find them.

~ J. Robert Oppenheimer

In some sort of crude sense, which no vulgarity, no humor, no overstatement can quite extinguish, the physicists have known sin; and this is a knowledge which they cannot lose.

~ J. Robert Oppenheimer

We knew the world would not be the same. A few people laughed, a few people cried. Most people were silent. I remembered the line from the Hindu scripture, the Bhagavad-Gita; Vishnu is trying to persuade the Prince that he should do his duty, and to impress him, takes on his multi-armed form and says, 'Now I am become Death, the destroyer of worlds.' I suppose we all thought that, one way or another.

~ J. Robert Oppenheimer

Now I am become death, the destroyer of worlds. (quoting the Bhagavad-Gita after witnessing the first Nuclear explosion.)

~ J. Robert Oppenheimer