0 to understand something (from a piece of writing etc) which is not actually stated -- leggere fra le righe
1 to look for or find information (eg in a letter) which is not actually stated -- leggere fra le righe
Reading between the lines I get the impression that he wants to leave the company.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Possiamo completarlo passo dopo passo, indipendentemente dalla lunghezza della strada, e non può essere completato, per quanto breve sia la strada, se non segni nemmeno la tua impronta.