If a man is often the subject of conversation he soon becomes the subject of criticism.
Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: ‘War is bad in that it begets more evil than it kills.’
Only the descent into the hell of self-knowledge can pave the way to godliness.
Every human being should always be treated as an end and never as a mere instrument.
I assert that, in any particular natural science, one encounters genuine scientific substance only to the extent that mathematics is present.
Act so as to use humanity, yourself and others, always as an end and never as a means to an end.
Most men use their knowledge only under guidance from others because they lack the courage to think independently using their own reasoning abilities. It takes intellectual daring to discover the truth.
Man relates to material things through direct insight rather than reason.
Heaven has given human beings three things to balance the odds of life: hope, sleep, and laughter.
Among all nations, through the darkest polytheism glimmer some faint sparks of monotheism.
The existence of the Bible is the greatest blessing which humanity ever experienced.
Fallacious and misleading arguments are most easily detected if set out in correct syllogistic form.
The greatest problem for the human species, the solution of which nature compels him to seek, is that of attaining a civil society which can administer justice universally.
Beauty presents an indeterminate concept of Understanding, the sublime an indeterminate concept of Reason.
Why were a few, or a single one, made at all, if only to exist in order to be made eternally miserable, which is infinitely worse than non-existence?
The inscrutable wisdom through which we exist is not less worthy of veneration in respect to what it denies us than in respect to what it has granted.
We find that the more a cultivated reason devotes itself to the aim of enjoying life and happiness, the further does man get away from true contentment.
The ultimate destiny of the human race is the greatest moral perfection, provided that it is achieved through human freedom, whereby alone man is capable of the greatest happiness.
It is through education that all the good in the world arises.
I have no knowledge of myself as I am, but merely as I appear to myself.