Vision: Looking at a mast: you have accomplished an enormous task and should be proud of yourself. You can start on a new project now.
If the mast is without sails: you still have hard work ahead before reaching the goal you have set for yourself.
A mast under sail means everything is going well.
Depth Psychology: A mast is either a phallic symbol (and therefore about sexual desire) or a sign of a strong personality. You are walking with your head held high on a straight and narrow path. You won’t bend for anything.
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