There are three principal means of acquiring knowledge... observation of nature reflection and experimentation. Observation collects facts reflection combines them experimentation verifies the result of that combination.

One of the principal goals in my life has been to avoid embarrassing my children by doing the job I do. I hope I've managed to do that and I hope that with the job I'm in now they are if not proud at least unembarrassed by it. I must say my three are most agreeable children who do nothing but delight me.

I remind everyone: Whether you school them at home or send them to school you as a parent have the responsibility to make sure they learn and behave. Teachers and principals may help but parents are the ones who must accept responsibility.

Smoking is the now the principal avoidable cause of premature death in Britain. It hits the worst off people hardest of all. Smoking is one of the principal causes of the health gap which leads to poorer people being ill more often and dying sooner.

I want to assure your excellency that I am occupying myself permanently and jointly with my team to achieve a solution as soon as possible to this crisis the principal objective being the safeguarding of the health and life of those who are inside.

There's nothing more important than our good health - that's our principal capital asset.

If we did not look to marriage as the principal source of happiness fewer marriages would end in tears.

Our nation was founded on the principals of life liberty and the pursuit of happiness.

Irreligion - the principal one of the great faiths of the world.

Laughter is the sensation of feeling good all over and showing it principally in one place.

It's funny: I'm a lifelong musician but because I principally play the piano it's been a solitary thing.

There is no nation so powerful as the one that obeys its laws not from principals of fear or reason but from passion.

The principal end both of my father and of myself in the conquest of India... has been the propagation of the holy Catholic faith.

Skepticism has never founded empires established principals or changed the world's heart. The great doers in history have always been people of faith.

If we're picking people to draw out of their own conscience and experience a 'new' Constitution we should not look principally for good lawyers. We should look to people who agree with us. When we are in that mode you realize we have rendered the Constitution useless.

The federal debt in this country is principally of Republican design.

My parents moved to American Samoa when I was three or four years old. My dad was principal of a high school there. It was idyllic for a kid. I had a whole island for a backyard. I lived there until I was eight years old and we moved to Santa Barbara.