In "House Fear" by Robert Frost, the poem supports that fear causes people to behave irrationally. In this poem, the person on the outside of the locked door does make noise while prolonging the opening of the door. The person holding the key rattles the lock and key, giving an intruder time to get out, just in case one should be in the house. This is an irrational behavior.
Also, leaving the door wide open until a lamp is lit is an irratioanl behavior. Fear causes one to automatically think someone is in the house. In reality, if someone were in the house, the danger is still there while lighting the lamp. It is irrational to think that someone is on the other side of a locked door. Now, if the door has been broken and the lock is busted, that is another thought. That instance gives support to fear. There is a sign that someone is in the house or has at least been in the house.
Yes, fear does cause people to behave irrationally. Fear can also paralyze one. Either way, fear is real and it causes irrational behavior. Frost or the speaker of the poem has great insight into the heart of mankind. Coming home to a dark, lonely house can cause one to behave irrationally. Shaking keys and rattling locks are just two ways people behave irrationally. Some people see things that are not there when coming home to a dark house. Some people hear noises that are not there when coming home to a dark house.
Although a dark house can cause irrational behavior, it is good that fear causes such actions. Fear keeps us on guard, just in case there is really something of which to be afraid. Fear is a protection agency. It keeps us alert and on the look out for danger. Irrational behavior is definitely caused by fear, but, in some instances, it can save a life. The poem is accurate in that people behave irrationally in the face of fear. That is not necessarily a bad thing.