Making them justify is a bit involved. You will need to change the markup to help wrap the icon and the heading tag together in a new div as shown below (pls switch to HTML tab to see this markup). Pls notice the new wrapper div named justify below which does not exist in the current markup –
[one_third]
[icon class="icon-heart"]
Timeless Design
Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet accusam takimata sanctus.
[/one_third]
and then you need to style this using the CSS –
.features-list-alternate .justify { display: inline-block;}
.features-list-alternate .fourcol { text-align: center; }
.features-list-alternate h3 { float: left; }