Memories are the key not to the past, but to the future.
A memory is what is left when something happens and does not completely unhappen.

It's a poor sort of memory that only works backward.
Memory is the diary that we all carry about with us.
Memories warm you up from the inside. But they also tear you apart.
The happiest memories are of moments that ended when they should have.

Some memories are unforgettable, remaining ever vivid and heartwarming!

Memories, even bittersweet ones, are better than nothing.