Also, I see what you mean. I understand, as in I see, you'd rather go running in the morning while it's cool, or It's too early to run an ad? I see what you mean. This idiom uses see in the sense of "perceive" or "comprehend," a usage dating from 1300. Also see as far as I can see.
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.