Man is a meaning seeking creature in a universe that offers no meaning. Hence the absurdity of existence
Even in the completest of love there remains an unsurmountable gap; an abyss of nothingness between the end of one finite creature and the beginning of another
Normally we think of freedom as something unequivocally good but awareness of our freedom also reminds us of our ultimate responsibility for ourselves and our life. And that realisation is riveted to dread.