We are not rich by what we possess but by what we can do without
German philosopher in the Age of Enlightenment. In his doctrine of transcendental idealism, he argued that space, time, and causation are mere sensibilities; "things-in-themselves" exist, but their nature is unknowable.
But only he who, himself enlightened, is not afraid of shadows
The death of dogma is the birth of morality
Out of the crooked timber of humanity, no straight thing was ever made.
One who makes himself a worm cannot complain afterwards if people step on him
I had to deny knowledge in order to make room for faith
Dare to think!
Four things were useless wealth without Expenditure in the way of Allah; Knowledge without practice; Piety for the sake of show prompted by worldliness Long life with no stock of good deeds
Doubt that the sun doth move, doubt truth to be a liar, but never doubt I love
Beauty is no quality in things themselves: It exists merely in the mind which contemplates them; and each mind perceives a different beauty
Nothing is so good for an ignorant man as silence; and if he was sensible of this he would not be ignorant
Nothing is better than reading and gaining more and more knowledge
Only put off until tomorrow what you are willing to die having left undone
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