I set out to discover the deep sources of his character and motivation.

He saw this as a disguise for a deeper source of concern.

Though she had intended no erotic implications, just gentle curiosity, his response was from a deeper source.

But maybe there was a deeper source of anxiety, a conflict at the heart of his project.

The hope was to be able to tease apart the potential deep and shallow sources of contamination.

"No one person can make a romance, and unrequited love is a deep source of pain."

The water all comes from the same deep source, but surface appearance of the springs differed.

But the strength to keep on, directly across that tide, came from a deeper source.

A deeper source of stability has been the land reform program of the 1950's.

There were no signs that brine from deep sources or radioactive material had made it into the local water supplies.