He should stop his selfish behavior.

It's important to believe in yourself.

He always has a mischievous smile on his face.

He has a warlike personality, always playing strategy games.

He likes toddlers and is always playing with children in the park.

He says that what you like to do, you do well, so he practices drawing every day.

The fact that he likes that movie is truly a case of 'there's no accounting for taste'.

He starts talking about himself at every opportunity, causing trouble for the people around him.

She always says 'the lady doth protest too much,' seeming to deny his actions, but in reality, she loves him very much.