It is the set of the sails, not the direction of the wind that determines which way we will go.
He who studies medicine without books sails an uncharted sea, but he who studies medicine without patients does not go to sea at all.
He who rides the sea of the Nile must have sails woven of patience.
Wisdom sails with wind and time.
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
I can't change the direction of the wind, but I can adjust my sails to always reach my destination.