A Wave is symbolized as one of the strongest forces on earth. So strength for one. Also if you read more into it, its about faith, a wave is you against mother nature, you cannot control it, you just have to put your faith into her. More
Had the privilege to hear these two designers speak at my university and their work is even more incredible than I could have remembered. A visual system of simple, but elegant glyphs by Eight Hour Day for the brand identity of Manifest.