Practical atheism, seeing no guidance for human affairs but its own limited foresight, endeavors itself to play the god, and decide what will be good for mankind and what bad.

There is a principle which is a bar against all information, which cannot fail to keep a man in everlasting ignorance-that principle is contempt prior to investigation.

The great aim of education is not knowledge but action.

The wise man must remember that while he is a descendant of the past, he is a parent of the future.

The society exists for the benefit of its members; not its members for the benefit of the society.

No one can be perfectly free till all are free; no one can be perfectly moral till all are moral; no one can be perfectly happy till all are happy.

All Socialism involves slavery.

Hero-worship is strongest where there is least regard for human freedom.

This survival of the fittest implies multiplication of the fittest.

Be bold, be bold, and everywhere be bold.

Civilization is a progress from an indefinite, incoherent homogeneity toward a definite, coherent heterogeneity.

Cell culture is a little like gardening. You sit and you look at cells, and then you see something and say, 'You know, that doesn't look right'.

Real prayer is communion with God

I don’t know, it is a very quiet rebellion. […] I don’t get angry. I sit quietly in the corner and say 'no'.

Learning a technique is not an end in itself, it merely indicates where you need to start.

You who have received so much love, show your love by protecting the sacredness of life. The sacredness of life is the greatest gifts that God has given us.

Basically, I love films where everything is great and life is good.

When you look at our world, the truth is that we're all under the influence of politics.

Being a musician is a given for me-I didn't have much choice in the matter.

Raise your limits as high as you dare and then take them a little further.

It's not always easy to tell the difference between thinking and looking out of the window.