Lets first start with the definitions:
Hard disk (Storage) – A hard disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage. A hard disk is for long-term memory.
RAM (Memory) – Random-access memory is a form of computer memory that can be read and changed in any order, typically used to store working data. RAM is for short-term memory.
If you look at Happiness as a memory, whether it’s in the past, present, or in the future, the memory allows us to be happy.
If you want to be happy for the long term, retain it for the long term, and build the happiness in your hard disk, hardwire yourself to be happy, to be smiling, to be contented. Gear yourself mentally as well as physically to be happy!
Whereas if you want to be short-term happy, and get yourself bogged down with life events forgetting about happiness, it goes in RAM. Only for a very short period and then replaced by other memories.
We should all aspire to build happiness into our Hard disk rather than in our RAM.