In this, however, Rilke commented that he was greatly influenced by the depiction of angels found in Islam.[1]:p.327[25][26] For Rilke, the symbol of the angel represents a perfection that is "beyond human contradictions and limitations" in a "higher level of reality in the invisible". Where there is incongruity that adds to mankind's despair and anxiety is due to human nature keeping us clinging to the visible and the familiar. As mankind encounters the invisible and unknown higher levels represented by these angels, the experience of the invisible will be "terrifying" (in German, schrecklich).[4][5][25]