That which our reason teaches us must always be done. There are three forms of the imperative. Or an unconditional moral obligation that is always binding irrespective of a person's inclination or purpose
Act only on that maxim that you can will to be universal law. This means that we should only do what we are willing for everyone to do. If I want to rob a bank, am I willing that everyone should also be a thief? If I cannot will this, then I should not rob banks
So act to treat persons always as an ends and never as a means only. Things should be done for the good of people, and people should never just be used for the sake of others or to support some abstract ideal
So act to treat everyone, including yourself, as an end in the kingdom of ends. This connects with the second form of the categorical imperative, and insists upon human dignity. Actions are done for the sake of persons, and we should treat everyone including ourselves, as the people for whom good must be done
The Enlightenment is not an historical period, but a process of social, psychological or spiritual development, unbound to time or place. Immanuel Kant defines "enlightenment" in his famous contribution to debate on the question in an essay entitled "An Answer to the Question: What is Enlightenment?" (1784), as humankind's release from its self-incurred immaturity; "immaturity is the inability to use one's own understanding without the guidance of another"
What we must do to achieve a particular goal. There is no requirement to follow this, but it is how we should act if we wish to achieve something; it has the character of 'If...then...' A moral obligation that applies only if one desires the implied goal
If something has intrinsic value or intrinsic interest, it is valuable or interesting because of its basic nature or character, and not because of its connection with other things
Rationalists claim that there are significant ways in which our concepts and knowledge are gained independently of sense experience. As opposed to Empiricists claim that sense experience is the ultimate source of all our concepts and knowledge