a still, small what?

There is no longer such a thing as a small voice. If you have it to say, say it – it will be heard.
Often, and most importantly, even if no one else does, you will actually hear yourself say it. Listen, take it in.

Write. Sing. Dance. Paint. Build. Create. Clean peoples teeth... Whatever.

Do it with honesty. Do it with passion. Pour yourself into it and stop wondering what the response or result will be, stop doing it for someone else. Life is short, moments are fleeting – leave a mark on them.

Stop waiting for the time to be right – it probably won't appear to be until it has passed.