There is always the hand that we hold, that guides us as we step through our life's work.
It guides us with the wisdom that is born out of years of experimentation and learning and experience. 
Today is the day to honour that wisdom, and the people who share it with us.

In the nicer traditions, this day is celebrated by remembering the life and work of one's teachers, or when that word is just not enough, one's gurus. I think that is exactly what I shall do...