He stubbornly stuck to his own beliefs and refused to listen to others' opinions.

She uploaded a selfie to Instagram.

She took a selfie and uploaded the photo to social media.

He likes talking about himself and often talks about his experiences and thoughts.

He set out on a journey of soul-searching.

Since that's his own concern, we better not interfere.

He should stop his selfish behavior.

He is sticking to his beliefs.

He was so nervous that his hands stiffened.

He always interacts with me without standing on ceremony, in a natural way.