be assured of something—
1. be guaranteed smth.:
- General Franks is assured of a place in history in a country where former officials are respected even when out of office.
2. have trust in smth.; be positive about smth.:
- The king was assured of the rectitude of the motives on which he had himself acted.
3. be firmly persuaded of smth.:
- In 1415, Hus was summoned to defend himself at the Council of Constance, having been assured of a safe conduct.
be sure of something—
1. feel confident of smth.:
- If nothing occurs to stir the rage of this vindictive madman, I am sure of victory.
2. = be assured of something 2:
- The jury are told they cannot convict unless they are “sure” of the man’s guilt.