It's important to believe in yourself.

You should protect your own health.

She uploaded a selfie to Instagram.

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

He should stop his selfish behavior.

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

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

He set out on a journey of soul-searching.

He drove himself into limbo with his own actions.

In Christianity, limbo is considered a place where souls temporarily stay after death.