It depends on the individual. Some people may find that their unquiet mind is a constant presence in their lives, while others may only experience it sporadically. The length of time that an unquiet mind persists also depends on the underlying cause. If the cause is something that can be resolved, such as stress or anxiety, then the unquiet mind may only last for a short period of time. However, if the cause is something more chronic or severe, such as bipolar disorder or schizophrenia, then the unquiet mind may last for much longer.