Memories are like buckets filled with water. There are some memories that you want to keep forever, and yet there are others you wish you could forget; but you don’t have any other choice but to forget it all if you want to move on; you have to sacrifice the good just to forget the bad.
And no matter how hard you try; life keeps moving on, and as long as you continue to live your life, the future will create more memories for you to store in your water bucket. And eventually, no knowing how long it may take; one day the memories from the future will overfill and the memories of from your past will spill out and be lost forever.
So if you choose to treat memories like a bucket of water, they will eventually all spill out and be lost for the rest of your life. That is if you live a life as constrained as buckets full of water, that is.
Keep your memories in cups instead; and label them appropriately so you never lose track. And if you’re ever afraid that you might knock over your memories and spill them, plant a flower and use your memories to water the seed, so that your memories can grow and blossom into something more beautiful than you could have imagined.