Fear is a self gifted trait of any psychology. Fear is a natural part of our conscience and is as obvious as happiness, anger, sadness, joy and much more. It is a feeling which originates from the outer world and then generates from the inner self.
To justify this, best is to take an example of a small baby who has no fear as he has no awareness. You might have seen parents tossing their babies in air only to catch them back wherein the baby has no fear as he is unaware of the aftermath of rising into the air. The baby feels happy and excited as he is only enjoying the ride. Similarly children who draw themselves away from studying or doing hard work are not afraid of the end results because they just don’t realise what would be the impact on their future. We can say that we generate the feeling of fear only when we are aware of our surroundings, in later stage though it can be classified as reality based fear or just a hoax.
Some acts of fear are habitual in nature or better to say superstitious. Like one of my cousin has a very strange habit of touching anything four times. for inference, whenever he touches something like door or wall he touches it again for three times as to complete the routine of four times. We must have many habits like this which are very normal and is just that we have made our mind that doing anything in this manner only will make that thing happen. In reality it doesn’t do anything but only satisfies our inner self. If something is not done in that very manner we tend to feel incomplete or awkward.
Overall, fear is an integral part of our personality and we should always try to overcome the same. Even the most prominent personalities of the world believed in these kind of superstitions.