If we admit something exists, we must also admit there is something which exists necessarily.
Reason looks around for a concept that is compatible with absolute necessity.
It finds the primordial being which is the condition of all possibility. But, it does not follow that a limited being is incompatible with absolute necessity, although we cannot infer its necessity from the universal concepts we have of it. Just as in the hypothetical syllogism we cannot say that where a certain condition does not hold, the conditioned also does not hold. Thus the argument fails. But this definition yields no insight into the conditions which make it necessary.