If we do not pay attention to sensory memories, they will most likely

Sensory memory, being very short-term in nature, will most likely fade within about half of a second of stimulus. Rehearsal, unlike with other forms of memory, will not increase recall. Attention to the memories will filter only the important ones to be encoded into long-term memory.

Hamlet's fourth soliloquy is probably his most famous one - "to be or not to be."it is rather different from his previous soliloquies because now he is contemplating something that didn't come up before - suicide. he is thinking whether it is worth it to fight to find his father's murderer when in the end all of them are going to die, so why not die sooner than later. he is contemplating if he should go on fighting or just kill himself and end it all, which is why this soliloquy in particular is rather depressing, hesitant, and gives a deeper insight into hamlet's madness.