The enemy of change, the confirmation bias.

The confirmation bias is the tendency to seek and interpret information in ways that support our existing beliefs, and to reject anything that challenges them. 

We stop evaluating data objectively, and we only see what fits our perception. 

This bias operates below our conscious awareness and affects all individuals, bypassing their logical thinking.
This phenomenon influences our decision-making process and shapes how they perceive reality. 

By disregarding information that don't agree with our current beliefs, we often end up acquiring partial or inaccurate knowledge.
Confirmation bias is the direct result of our brain's quest for consistency, because information that aligns with our beliefs feels comfortable, whereas contradicting data can create discomfort and forces our brain to exert itself more. 

Being aware of the confirmation bias is important, because it affects all aspects of our life, from how we learn, how we think, to how we interact with others. 
The "first impression" is a well-known example related to this bias because it makes us interpret people's subsequent behaviours in ways that confirm our initial impression.

A simple example is that people would laugh at a joke made by a person "perceived" as funny, while they would remain impassive if the same joke were told by a person who is perceived as humourless.
Social media platforms use that phenomenon by exposing users to content similar to what they usually consume, which submerges them in information that reinforces their beliefs.

The confirmation bias can provide with a feeling of comfort, but it can also cause us to make poor decision. 

When we only consider what agrees with our views, we can reach conclusions that are incomplete or inaccurate. 
The willingness to question our assumptions and consider opposing viewpoints can promote a more balanced perspective, and expose us to new ideas and modes of reasoning.