" I know what it feels like to have the door slammed firmly in my face, so I’m cool with that. "
- Mos Def

When someone says they know what it feels like when a door has been shut in their face, they are referring to experiencing rejection or being ignored outright by others. This person acknowledges that feeling but remains calm and accepts it as part of life’s experiences.

The deeper meaning of this statement lies in resilience and personal strength. The speaker is conveying an understanding that encountering resistance or rejection is a common occurrence in life and does not necessarily define one's character or future outcomes. By remaining “cool” with such setbacks, the individual demonstrates emotional maturity and a commitment to maintaining inner peace despite external challenges. This perspective encourages others to view obstacles as temporary and not to let them dictate their overall sense of self-worth.

Mos Def, born Dante Terrell Smith in 1973, is an American rapper, actor, and producer known for his powerful lyrics and social activism. His quote reflects the wisdom gained from navigating various challenges in both his personal life and career.