In this situation, the proverb 'it is best to submit to circumstances' applies.

He is studying about the uncontacted tribes in the Amazon.

He is from a tribe in Africa.

He spoke to me directly.

Please go straight on this road.

His opinions are always direct, and that's part of his charm.

He is a very sincere person.

I should do my duty.

This yogurt is fat free.

I was diagnosed with fatty heart by the doctor.