Jamieson, Fausset & Brown

And that--rather, "And this [do]" knowing the time, that now it is high time--literally, "the hour has already come." to awake out of sleep--of stupid, fatal indifference to eternal things. for now is our salvation--rather, "the salvation," or simply "salvation." nearer than when we--first believed--This is in the line of all our Lord's teaching, which represents the decisive day of Christ's second appearing as at hand, to keep believers ever in the attitude of wakeful expectancy, but without reference to the chronological nearness or distance of that event.