He who knows no hardships will know no hardihood. He who faces no calamity will need no courage. Mysterious though it is the characteristics in human nature which we love best grow in a soil with a strong mixture of troubles.

After World War II great strides were made in modern Japanese architecture not only in advanced technology allowing earthquake resistant tall buildings but expressing and infusing characteristics of traditional Japanese architecture in modern buildings.

Old age and sickness bring out the essential characteristics of a man.

The information encoded in your DNA determines your unique biological characteristics such as sex eye color age and Social Security number.

As technology advances it reverses the characteristics of every situation again and again. The age of automation is going to be the age of 'do it yourself.'