Human beings are comfortable with people they trust.
They trust people who they believe share similarities with them.
People see similar facial expressions, body language and behaviour, and believe they share the same interests.
People hear similar speech patterns, speed, intonations and topics, and believe they share the same opinions.
People move in the same directions, towards the same things, and believe they share the same goals.
People react to the same situations with the same emotions, and they believe they share the same values.
When you are able to behave, speak, aim and emote the same way, you will have built the minimum foundation of trust.
Water in a teacup becomes the teacup. Become water, my friend.