Strength in the Fall

I remember a reflection from years ago, what makes you strong?  This time of year the sun starts to leave us more and more everyday.  And despite the excitement of glowing leaves in the dark and crisp air and blue skies, the shortened days can have a weakening effect.  Are we strongest during invincible summer, or in the winter when we carry on with doubt and heaviness?  Sometimes we are blinded by the weakness we think we carry.  And also the strength.  And sometimes lifting a little more seems to lighten the load.