People procrastinate because ...

People procrastinate because they are afraid of the success that they know will result if they move ahead now.
People procrastinate because they are afraid of the success that they know will result if they move ahead now.

More phrases

All the great things are simple, and many can be expressed in a single word: freedom, justice, honor, duty, mercy, hope.
I know but one freedom and that is the freedom of the mind.
 Antoine de Saint-Exupéry
Freedom is not worth having if it does not connote freedom to err.
The amount of happiness that you have depends on the amount of freedom you have in your heart.
 Thích Nhất Hạnh
Without freedom of thought, there can be no such thing as wisdom - and no such thing as public liberty without freedom of speech.

Quotes from the same author

You must welcome change as the rule but not as your ruler.
The only person who never makes mistakes is the person who never does anything.
There are two primary choices in life: to accept conditions as they exist or accept responsibility for changing them.
A dream is your creative vision for your life in the future. You must break out of your current comfort zone and become comfortable with the unfamiliar and the unknown.
Happiness cannot be travelled to, owned, earned, worn or consumed. Happiness is the spiritual experience of living every minute with love, grace and gratitude.