However subtle and tender the bond may be, it remains to the last physical rather than chemical; mechanical rather than vital; the outward attachment of mutually exclusive wholes, rather than the inner blending of complemental elements which lose their separate selfhood in the unity of a new and higher life.
"Practical Ethics"
William DeWitt Hyde
The two are complemental and necessary to each other.
"Browning and the Dramatic Monologue"
S. S. Curry
Words and actions are complemental languages.
"Browning and the Dramatic Monologue"
S. S. Curry