One word characterizes the most strenuous of the efforts for the advancement of science that I have made perservereingly during fifty-five years; that word is failure

Children are the keys of paradise.

There is sublime thieving in all giving. Someone gives us all he has and we are his.

Those who are in love with the present can be cruel and corrupt but not genuinely vicious. They cannot be methodically and consistently ruthless.

If a society is to preserve stability and a degree of continuity, it must learn how to keep its adolescents from imposing their tastes, values, and fantasies on everyday life.

It is the pull of opposite poles that stretches souls. And only stretched souls make music.

It is also plausible that those movements with the greatest inner contradiction and between profession and practice - that is to say with a strong feeling of guilt - are likely to be the most fervent in imposing their faith on others.