I loved playing the piano when I was a kid, but when my family and I immigrated to Australia we had to leave our piano behind. We couldn't afford one here for years, and so I eventually forgot a lot of what I'd learned in my childhood lessons. I suppose now that I have a keyboard, there's nothing stopping me from learning again. I probably should.
Same question.
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)