There was to be no immediate return; their captivity would last long enough to make it worth their while to build houses and plant gardens. For the present they were to regard Babylon as their home. The prospect of restoration to Judah was too distant to make any practical difference to their conduct of ordinary business. The concluding command to "seek the peace of Babylon" is a distinct warning against engaging in plots, which could only ruin the conspirators. There is an interesting difference between these exhortations and those addressed by Paul to his converts in the first century. He never counsels them to marry, but rather recommends celibacy as more expedient for the present necessity. Apparently life was more anxious and harassed for the early Christians than for the Jews in Babylon. The return to Canaan was to these exiles what the millennium and the Second Advent were to the primitive Church. Jeremiah having bidden his fellow-countrymen not to be agitated by supposing that this much-longed event might come at any moment, fortifies their faith and patience by a promise that it should not be delayed indefinitely. "When ye have fulfilled seventy years in Babylon I will visit you, And will perform for you My gracious promise to bring you back to this place."[125] Seventy is obviously a round number. Moreover the constant use of seven and its multiples in sacred symbolism forbids us to understand the prophecy as an exact chronological statement. We should adequately express the prophet's meaning by translating "in about two generations." We need not waste time and trouble in discovering or inventing two dates exactly separated by seventy years, one of which will serve for the beginning and the other for the end of the Captivity. The interval between the destruction of Jerusalem and the Return was fifty years (B.C. 586-536), but as our passage refers more immediately to the prospects of those already in exile, we should obtain an interval of sixty-five years from the deportation of Jehoiachin and his companions in B.C. 601. But there can be no question of approximation, however close. Either the "seventy years" merely stands for a comparatively long period, or it is exact. We do not save the inspiration of a date by showing that it is only five years wrong, and not twenty. For an inspired date must be absolutely accurate; a mistake of a second in such a case would be as fatal as a mistake of a century. Israel's hope is guaranteed by God's self-knowledge of His gracious counsel:-- "I know the purposes which I purpose concerning you, is the utterance of Jehovah, Purposes of peace and not of evil, to give you hope for the days to come."