For a friend who dealt with a heckler:
Art is never a guarantee. It's a tumultuous journey that promises exceptional highs, uncomfortable lows, and a myriad of experiences that, at the end of the journey, one could never - would never - replace.
Don't feel discouraged. This is one of the many plights of an artist. It is not an easy path we follow, but one our hearts yearn for none-the-less.
For every person who is deaf to our sound, there are so many more who can hear, who are touched, who's eyes glaze over in a recognition of souls...
And if ever you have a day where those kindred spirits are not near - or are perhaps replaced with nasty little creatures that take pleasure in spreading misery - remember your own soul, and how it delights in the creation. Remember how it makes you feel. The love affair that stole your entire being and refuses to let go; the passion it has evoked in you; the moments of sheer ecstasy that buds from inside of you.
Remember that sound, for you, and play for you.
The kindred listeners will return.
The assholes can shove milk crates up their arses and go for a horse ride.
Determination is the key to success. Living in your own moment is the key to happiness.