If you ever think about giving up, remember why you held on for so long.
Intelligence is what you use when you don’t know what to do.
People eat meat and think they will become as strong as an ox, forgetting that the ox eats grass.
I can’t think of anything better in the world to be but a vegan.
Psychology is action, not thinking about oneself.
Thus, the task is not so much to see what no one yet has seen, but to think what nobody yet has thought about that which everybody sees.
Science is a way of thinking much more than it is a body of knowledge.
We are an intelligent species and the use of our intelligence quite properly gives us pleasure. In this respect the brain is like a muscle. When we think well, we feel good. Understanding is a kind of ecstasy.
Instead of thinking outside the box, get rid of the box.
Not to be able to stop thinking is an affliction, but we don’t realise this because almost everybody is suffering from it.
Think higher, feel deeper.
At the end of the day, we can endure much more than we think we can.
Think for yourself, or others will think for you without thinking of you.
Rule your mind or it will rule you.
Sapere aude. Dare to be wise.
Thoughts without content are empty, intuitions without concepts are blind.
Your life today is a result of your thinking yesterday. Your life tomorrow will be determined by what you think today.
They deem me mad because I will not sell my days for gold; and I deem them mad because they think my days have a price.
I do not fix problems. I fix my thinking. Then problems fix themselves.
The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.