It is believed that dark matter makes up most of the universe.

The existence of dark matter has not yet been fully proven.

The greater part of the time is spent on work.

He occupies an important position in the company.

In philosophy, we consider ourselves a part of the macrocosm.

He likes to think deeply.

He made a long journey in search of the abode of Buddhism.

It's difficult to solve a part of this problem.

His heart was full of darkness.

He was able to find the way in the darkness.