Acerbic adj. Sharp or biting, as in character or expression. “The director occasionally allowed an acerbic tone to an otherwise subtle dialogue.”

The past cannot be changed. The future is yet in your power.

Change your life today. Don't gamble on the future, act now, without delay.

The level of our success is limited only by our imagination and no act of kindness, however small, is ever wasted.

Develop success from failures. Discouragement and failure are two of the surest stepping stones to success.

The first step toward success is taken when you refuse to be a captive of the environment in which you first find yourself.

There's a lot of blood, sweat, and guts between dreams and success.

Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing or learning to do.

A little more persistence, a little more effort, and what seemed hopeless failure may turn to glorious success.

Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.