Fear of knowing is very deeply a fear of doing.
The spiritual life is part of the human essence. It is a defining characteristic of human nature, without which human nature is not fully human.
We do what we are and we are what we do.
What a man can be, he must be. This need we call self-actualizat ion.
Boys will be boys as long as there are no girls in the picture.
Life is an ongoing process of choosing between safety (out of fear and need for defense) and risk (for the sake of progress and growth). Make the growth choice a dozen times a day.