Scale box in millimeters. Vesicular texture is a volcanic rock texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside.
The definition of bliss is complete happiness. 1  An example of bliss is what someone feels after a relaxing massage.  An example of bliss is the act of doing work you love.
So in short, the only time ignorance does not mean bliss is when you're the right person in the right place at the right time to gain something from this knowledge you have.