Act as if the maxim of your action were to become through your will a general natural law
Those who know, do. Those that understand, teach.
There is no question climate change is happening. The only arguable point is what part humans are playing in it.
Wrong life cannot be lived rightly.
And this sensitivity will create new friendships for you - friendships with trees, with birds, with animals, with mountains, with rivers, with oceans, with stars. Life becomes richer as love grows.
You can best serve civilization by being against what usually passes for it.
The path to success is to take massive, determined action.
Moderation in temper is always a virtue; but moderation in principle is always a vice.
All imperfection is easier to tolerate if served up in small doses.
All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.
It is not the strength, but the duration, of great sentiments that makes great men.
Your reputation is in the hands of others. That's what the reputation is. You can't control that. The only thing you can control is your character.
Be silent or let thy words be worth more than silence.
Anger begins in folly, and ends in repentance.
Wisdom begins at the end.
If we don't believe in freedom of expression for people we despise, we don't believe in it at all.
The best revenge is to be unlike him who performed the injury.
Experience teaches us that it is much easier to prevent an enemy from posting themselves than it is to dislodge them after they have got possession.
Blessed are they who hunger and thirst for righteousness for they shall be satisfied.
Thoughts without content are empty, intuitions without concepts are blind.
One just needs a little alertness to see and find out: Life is really a great cosmic laughter.