The ordeal of virtue is to resist all temptation to evil.

A writer may tell me that he thinks man will ultimately become an ostrich. I cannot properly contradict him.

Each pursues his own theory, little solicitous to correct or improve it by an attention to what is advanced by his opponents.

I think it will be found that experience, the true source and foundation of all knowledge, invariably confirms its truth.

No limits whatever are placed to the productions of the earth; they may increase forever.

The power of population is indefinitely greater than the power in the earth to produce subsistence for man.

The main peculiarity which distinguishes man from other animals is the means of his support-the power which he possesses of very greatly increasing these means.

The friend of the present order of things condemns all political speculations in the gross.

It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment.

Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.

In a state therefore of great equality and virtue, where pure and simple manners prevailed, the increase of the human species would evidently be much greater than any increase that has been hitherto known.

The ordeal of virtue is to resist all temptation to evil.

The constant effort towards population, which is found even in the most vicious societies, increases the number of people before the means of subsistence are increased.

Population, when unchecked, increases in a geometrical ratio.

The rich, by unfair combinations, contribute frequently to prolong a season of distress among the poor.

A great emigration necessarily implies unhappiness of some kind or other in the country that is deserted.

The great and unlooked for discoveries that have taken place of late years have all concurred to lead many men into the opinion that we were touching on a period big with the most important changes.

The histories of mankind are histories only of the higher classes.

The superior power of population cannot be checked without producing misery or vice.

I do not know that any writer has supposed that on this earth man will ultimately be able to live without food.

The most baleful mischiefs may be expected from the unmanly conduct of not daring to face truth because it is unpleasing.

The world's population will multiply more rapidly than the available food supply.

Boldness and decision command, often even in evil, the respect and concurrence of mankind.

For those whose wit becomes the mother of villainy, those it educates to be evil in all things.

Words - so innocent and powerless as they are, as standing in a dictionary, how potent for good and evil they become in the hands of one who knows how to combine them.

Some things must be good in themselves, else there could be no measure whereby to lay out good and evil.

Destroy the seed of evil, or it will grow up to your ruin.

Once to every person and nation come the moment to decide. In the conflict of truth with falsehood, for the good or evil side.

Into every soul, however purged and fenced, evil appears to have as much freedom of entrance as God Himself.

What I have learned from my work up to now, is to try to be open, but also protect myself by not letting the good and the evil get too much importance.

Mankind is not likely to salvage civilization unless he can evolve a system of good and evil which is independent of heaven and hell.

One who is injured ought not to return the injury, for on no account can it be right to do an injustice; and it is not right to return an injury, or to do evil to any man, however much we have suffered from him.

The 20th century taught us how far unbridled evil can and will go when the world fails to confront it. It is time that we heed the lessons of the 20th century and stand up to these murderers. It is time that we end genocide in the 21st century.

Every war results from the struggle for markets and spheres of influence, and every war is sold to the public by professional liars and totally sincere religious maniacs, as a Holy Crusade to save God and Goodness from Satan and Evil.

A great book is like great evil.

May the forces of evil become confused on the way to your house.

Be assured those will be thy worst enemies, not to whom thou hast done evil, but who have done evil to thee. And those will be thy best friends, not to whom thou hast done good, but who have done good to thee.

Hatred is gained as much by good works as by evil.

Neither gods nor men can foresee when an evil deed will bear its fruit.

Wisdom is the knowledge of good and evil, not the strength to choose between the two.

I am in politics because of the conflict between good and evil, and I believe that in the end good will triumph.

Every Christian will allow that sin is an evil, and that it is our duty not to commit sin.

But other vampire stories? Well, no, I really haven't read too many, and I can't say I'm crazy about romantic vampires anyway - to me the vampire is simply an evil monster.

We all agree that we've got to bring these terrorists to justice and to make sure that they're never allowed to perpetrate such an evil act as they did. And so all of us are dealing with that. We know that the President has the authority to go to war under the War Powers Act.

A resolution to avoid an evil is seldom framed till the evil is so far advanced as to make avoidance impossible.

Idleness among children, as among men, is the root of all evil, and leads to no other evil more certain than ill temper.

Example moves the world more than doctrine. The great exemplars are the poets of action, and it makes little difference whether they be forces for good or forces for evil.

However things may seem, no evil thing is success and no good thing is failure.

Art is an attempt to integrate evil.