His jokes often turn out to be many a true word spoken in jest.

He is suffering from the consequences of his own actions. It's truly a case of reaping what one sows.

He was able to find a solution from a difficult situation.

He won the game with a strategy of winning by a surprise move.

He always acts conspicuously, so the proverb 'The nail that sticks out gets hammered down' fits him perfectly.

He always acts conspicuously, which reminds me of the proverb, 'The nail that sticks out gets hammered down.'

The idea for his new project came from nature.

The sunlight poured into the room, making it very bright.

Nikko is my best friend.

His name is used as part of the genitive case.