He achieved success for himself through hard work and determination.

It is difficult to know oneself.

I prefer to do things by myself.

Believe in oneself and anything is possible.

It's important for young adults to learn how to fend for themselves.

He was always looking out for himself and his own interests.

I often find myself lost in thought when I'm alone.

He tried to ingratiate himself with his boss by complimenting her constantly.

Sometimes, I find myself talking to myself when I'm alone.