'And they said' means that this was done. 'Let us build ourselves a city and a tower' means that they fabricated a form of doctrine and of worship - 'a city' is doctrine, 'a tower' worship of self. 'And its head in heaven' means to the extent of their ruling over things in heaven. 'And let us make a name for ourselves' means that as a result they might gain a reputation for power. 'Lest perhaps we are scattered over the face^a of the whole earth' means that otherwise they would not receive recognition.

Notes