Without continual growth and progress, such words as improvement, achievement, and success have no meaning.

Those who cannot work with their hearts achieve but a hollow, half-hearted success that breeds bitterness all around.

The more we realize our minuteness and our impotence in the face of cosmic forces the more astonishing becomes what human beings have achieved.

Some are born great, others achieve greatness.

Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.

Nothing truly valuable can be achieved except by the unselfish cooperation of many individuals.

Noise proves nothing. Often a hen who has merely laid an egg cackles as if she had laid an asteroid.

Failures are finger posts on the road to achievement.

Be more dedicated to making solid achievements than in running after swift but synthetic happiness.