There is a readiness in the mind that does not wait forever, a moment when love is close enough to be chosen, and the urgency here is a mercy rather than a threat. To walk while the light is present means to act from the teacher of love now, before fear settles back over perception and hides the way. A mind that has let guilt darken its sight cannot tell where it is going, because it reads every road by the wrong voice and mistakes attack for safety.
So the counsel is simply to choose while choosing feels possible. Love does not withdraw, but the willingness to see by it flickers, and each turning toward it makes the next turning easier. Direction is lost only when the mind agrees to walk by its own darkness and calls that blindness sight.
Light: the presence of love in the mind, the only seeing by which its true way is known.
Darkness: the mind's own guilt cast over perception, the blindness that cannot tell where it is going.