I have not failed. I've just found 10,000 ways that won't work.

There is no substitute for hard work.

Opportunity is missed by most people because it is dressed in overalls and looks like work.

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.

Genius is one percent inspiration and ninety-nine percent perspiration.

There is no substitute for hard work.

-- Thomas Edison

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.

-- Pelé

Yesterday's home runs don't win today's games.

-- Babe Ruth

One only sees what one already knows and understands.

-- Johann Wolfgang von Goethe

No plan survives first contact with the enemy.

-- Carl von Clausewitz

When you are earnest, wisdom emerges. When you are half-hearted, complaints emerge. When you are careless, excuses emerge.

-- Takeda Shingen