Dual PanelSynonym for: It is necessary.
See Definition for \dei\ 1163 See Definition for \ofeilei\ 3784
\dei\, the third person of \dew\, is commonly used impersonally in classical Greek. This usage is less common, but frequent, in the N.T. \dei\ indicates a necessity in the nature of things rather than a personal obligation; it describes that which must be done.
\ofeilei\ indicates rather the personal obligation; it is that which is proper, something that ought to be done.