“If you don't get it, you don't get it.""
…
""If you don't get it, you may yet.”

Widespread late 20th century aphorism that appears to have been first attributed to Gandhi in various self-help books of the early 2000s. Google Books http://books.google.co.uk/books?lr=&as_brr=0&q=%22If+you+don%27t+ask%2C+you+don%27t+get%22+Gandhi&btnG=Search+Books
Disputed

Sam Harris, Big Think Sam Harris On Death http://bigthink.com/ideas/3127 (July 4, 2007)
2000s
Context: We just don’t teach people how to grieve. You know, religion is the epitome, the antithesis of teaching your children how to grieve. You tell your child that, “Grandma is in heaven”, and there’s nothing to be sad about. That’s religion. It would be better to equip your child for the reality of this life, which is, you know, we... death is a fact. And we don’t know what happens after death. And I’m not pretending to know that you get a dial tone after death. I don’t know what happens after the physical brain dies. I don’t know what the relationship between consciousness and the physical world is. I don’t think anyone does know. Now I think there are many reasons to be doubtful of naïve conceptions about the soul, and about this idea that you could just migrate to a better place after death. But I simply don’t know about what... I don’t know what I believe about death. And I don’t think it’s necessary to know in order to live as sanely and ethically and happily as possible. I don’t think you get... You don't get anything worth getting by pretending to know things you don't know.

Franklyn Broude, as quoted in Sitting on a File Cabinet, Naked, with a Gun: True Stories of Silicon Valley (2009) by Linda McFarland, Joanne Linden and Sharon Turnoy
Misattributed

Source: Shadowfever

The Authoritative Calvin and Hobbes