It means that you should stick to your current choice without wavering, and don’t lose control in the face of temptation.
Translation: You must stick to your current choice and do not be influenced by other things (don’t ask him for help). Those options may seem beautiful and tempting (like a crane flying in), but they are all poisonous traps. (Hidden arrow). The last two sentences also have the same meaning. If you are going to collect firewood, there will be snakes in the grass and you will be bitten by venomous snakes (it also means that if you change other ways, you will be hurt by hidden traps).
Best wishes.