The Danger Is Different From The Fear.

In My Experience, Fear Comes From Not Knowing What To Expect And Not Feeling You Have Any Control Over What’s About To Happen. When You Feel Helpless, You’re Far More Afraid Than You Would Be If You Knew The Facts.

Other Anatomical Changes Associated With Long-duration Space Flight Are Definitely Negative: The Immune System Weakens, The Heart Shrinks Because It Doesn't Have To Strain Against Gravity, Eyesight Tends To Degrade, Sometimes Markedly (no One's Exactly Sure Why Yet). The Spine Lengthens As The Little Sacs Of Fluid Between The Vertebrae Expand, And Bone Mass Decreases As The Body Sheds Calcium. Without Gravity, We Don't Need Muscle And Bone Mass To Support Our Own Weight, Which Is What Makes Life In Space So Much Fun But Also So Inherently Bad For The Human Body, Long-term.

Sweat The Small Stuff. Without Letting Anyone See You Sweat.

There's Really Just One Thing I Can Control: My Attitude During The Journey, Which Is What Keeps Me Feeling Steady And Stable, And What Keeps Me Headed In The Right Direction. So I Consciously Monitor And Correct, If Necessary, Because Losing Attitude Would Be Far Worse Than Not Achieving My Goal.

In Any Field, It's A Plus If You View Criticism As Potentially Helpful Advice Rather Than As A Personal Attack.