On is always maintaining a calm attitude.

He was worried about starting a new project, but I advised him, 'Doing something is easier than worrying about it.'

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

He decided to quit his job because it was a low salary.

His behavior became grounds for suspicion.

He was out of breath after running a long distance.

He explained the importance of studying while young, saying 'If you do not study when you are young, it will be difficult to learn when you are old.'

I fed the pigeons in the park.

I would rather go alone.