Not all of a person's beliefs are themselves conclusions of other reasoning. Some beliefs, including some people use as premises when reasoning, are 'basic', not conclusions of reasoning. Rather, non-deliberative reason ordinarily directs our acceptance of basic beliefs. Most basic beliefs are grounded directly in evidence our sensory experience provides. Though a person often knows directly, through direct awareness, when he is pondering the merits of an object, ordinarily a person does not know directly, through direct awareness or introspection, that nondeliberative reason has guided him in the formation of a belief or desire.
Many desires follow lengthy deliberation.
A musician may deliberate long and hard before he begins to desire to have surgeons reshape his nose. However, as with beliefs, nondeliberative reason regularly guides desires. Upon being bitten by mosquitoes in the woods I may desire to leave the woods. There is reason for me to want not to walk in a mosquito-infested area, and my desire causally hinges on this reason, though I may not contemplate the merits of walking in the woods. He does not merely assume that a person has reason to seek that which is a means to something he desires.