Update index.md (#37)

Add a motto.

src/index.md

@@ -5,6 +5,8 @@ tags:
 
 # Welcome to Foliant!
 
+> Better spend one day learning to fly and get there in five minutes than walking.
+
 Foliant is an all-in-one single-source documentation authoring tool. It lets you produce standalone documents in **pdf** and **docx**, build **static websites** and upload pages to **Confluence**, all from single Markdown source.
 
 Foliant is a higher order tool, which means it uses other programs to do its job. For building pdf and docx, it can use [Pandoc](https://pandoc.org/) or [md-to-pdf](https://github.com/simonhaenisch/md-to-pdf), for websites [MkDocs](https://www.mkdocs.org/), [Aglio](https://github.com/danielgtaylor/aglio) or [Slate](https://github.com/slatedocs/slate).