  Theoretical reason, interpreted along these lines, addresses the considerations that recommend accepting particular claims as to what is or is not the case.  That is, it involves reflection with an eye to the truth of propositions, and the reasons for belief in which it deals are considerations that speak in favor of such propositions’ being true, or worthy of acceptance. Practical reason, by contrast, is concerned not with the truth of propositions but with the desirability or value of actions. The reasons in which it deals are considerations that speak in favor of particular actions being good, or worthy of performance in some way. This difference in subject matter corresponds to a further difference between the two forms of reason, in respect of their consequences. Theoretical reflection about what one ought to believe produces changes in one’s overall set of beliefs, whereas practical reason gives rise to action; as noted above, it is practical not only in its subject matter, but also in its issue.