An Idealistic Realist

I'm not a realist. I'm an idealist, sufficiently experienced in reality.

This means that I always see the glass as half full, while understanding that sometimes the glass is filled with dirty water.

Even then, a realist would complain about the color of the water and slacken his efforts while an idealistic realist would be grateful for the water, recognize the contamination, and then become engaged in effort to filter and improve the water with a vision and faith that it can, and will be through his efforts, pure again.