Religion is not merely the opium of the masses, it's the cyanide.
The sciences are not sectarian. People do not persecute each other on account of disagreements in mathematics. Families are not divided about botany and astronomy does not even tend to make a man hate his father and mother. It is what people do not know that they persecute each other about. Science will bring, not a sword, but peace.
Robert G. Ingersoll
If God has spoken, why is the world not convinced.
Percy Bysshe Shelley
A man's ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.
A lie is a lie even if everyone believes it. The truth is the truth even if no one believes it.
I'm an atheist, and that's it. I believe there's nothing we can know except that we should be kind to each other and do what we can for other people.
Hast thou reason? I have.
Why then dost not thou use it?
For if this does its own work,
what else dost thou wish?
Religions are like fireflies. They require darkness in order to shine.
“We are all atheists about most of the gods that humanity has ever believed in. Some of us just go one god further.”