Buddhism explains life situation as the law of karma. To obtain mental well-being, the person needs to focus on the present time since it is the time the person has most power for karma. The person can choose to continuingly create good karma record in the present time for good
future.
Meditation is a powerful practice to understand one's unconsciousness. Deep good thoughts, acts and memory can be recorded in unconsciousness. The soul with good karma will reflect goodness both in unconsciousness and consciousness. Reasons create an understanding, make the issues become clear and provide direction to pursue mental well-being.