No great discovery was ever made without a bold guess.

When you believe in a thing, believe in it all the way, implicitly and unquestionably.

Whatever the mind of man can conceive and believe, it can achieve.

Truth can be stated in a thousand different ways, yet each one can be true.

Only the wisest and stupidest of men never change.

Our greatest glory is not in never falling but in rising every time we fall.

In life, you need either inspiration or desperation.

Perseverance and spirit have done wonders in all ages.

Determine never to be idle. No person will have occasion to complain of the want of time, who never loses any. It is wonderful how much may be done, if we are always doing.

Write it on your heart that every day is the best day in the year.

When it comes down to it, I let them think what they want. If they care enough to bother with what I do, then I'm already better than them.

A man is but the product of his thoughts. What he thinks, he becomes.

You see things; you say, 'Why?' But I dream things that never were; and I say 'Why not?

For me, I'm focused on what I want to do. I know what I need to do to be a champion, so I'm working on it.

I don’t think we are going to become extinct. We are very clever and very resourceful.

For every man there exists a bait which he cannot resist swallowing.

The secret of health for both mind and body is not to mourn for the past, nor to worry about the future, but to live the present moment wisely and earnestly.

However difficult life may seem, there is always something you can do and succeed at.

The greatest accomplishment is not in never falling, but in rising again after you fall.

We are all motivated by a keen desire for praise, and the better a man is, the more he is inspired by glory.

It's the little details that are vital. Little things make big things happen.