Thou turnest man to destruction; and sayest, Return, ye children of men. / For a thousand years in thy sight are but as yesterday when it is past, and as a watch in the night. / Thou carriest them away as with a flood; they are as a sleep: in the morning they are like grass which groweth up. / In the morning it flourisheth, and groweth up; in the evening it is cut down, and withereth.
Second, to say that something is introspectible, that we can introspect it, is not to imply that we are in fact aware of it. What's more, I haven't claimed that we even can introspect all the thoughts we have, only that we can introspect that we have two important sorts of thoughts.
Dreaming when Dawn's Left Hand was in the Sky
I heard a Voice within the Tavern cry,
Awake, my Little ones, and fill the Cup
Before Life's Liquor in its Cup be dry.