Vision: Eating nuts means good fortune and recognition. Cracking nuts but not eating them means hard work but slow success.
If cracking nuts is difficult: you will need every ounce of strength to reach your goal. Looking at nuts: a noble character is hidden behind a rough exterior. Eating a bitter nut: bad luck, but you don’t need to take the coming events too seriously! Cracking an empty nut shell: someone is going to disappoint you very deeply. See Almonds.
Depth Psychology: A nut may be a reference to your character or the truth about a certain matter. Sometimes it also indicates stupidity, your own or that of others. It may be a symbol for a difficult task—wa tough nut to crack”—or one that can’t be accomplished without assistance.... Dreamers Dictionary